RadRichTextBoxRibbonUI taking long time to load

[Ahror]

Hi everybody, I am using a RadRichTextBoxRibbonUI in my Notebook control and it's taking some time to load (about 2 seconds). So does anybody have any idea to solve this issue?

<telerik:RadRichTextBoxRibbonUI Grid.Row="0" BackstageClippingElement="{Binding ElementName=uiRichTextBoxParent}" CollapseThresholdSize="50,50"
                                   ApplicationButtonContent="File"
                                   wpf:UISettings.Identifier="Blue"
                                   wpf:UISettings.Type="{x:Type local:RichTextAdvancedControlSetting}"
                                   IsMinimized="{wpf:UISettings Path=RibbonUiIsMinimized}"
                                   DataContext="{Binding Commands, ElementName=uiRichTextBox}" ApplicationName="" Title="" IsMinimizable="True" MinimizeButtonVisibility="Visible">
       <telerik:RadRichTextBoxRibbonUI.Resources>
           <telerik:FontFamiliesProvider x:Key="FontFamiliesProvider"/>
           <telerik:EditingContextTypeToBoolConverter x:Key="EditingContextTypeToBoolConverter"/>
       </telerik:RadRichTextBoxRibbonUI.Resources>
       <telerik:RadRichTextBoxRibbonUI.Backstage>
           <telerik:RadRibbonBackstage>
               <telerik:RadRibbonBackstageItem Header="New" Icon="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/new.png" IsSelectable="false" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding NewDocumentCommand}"/>
               <telerik:RadRibbonBackstageItem Header="Open" Icon="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/open.png" IsSelectable="false" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding OpenDocumentCommand}"/>
               <telerik:RadRibbonBackstageItem Header="Save" Icon="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/save.png" IsSelectable="false" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding SaveCommand}"/>
               <telerik:RadRibbonBackstageItem Header="Save As" Icon="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/saveas.png" IsDefault="false">
                   <StackPanel HorizontalAlignment="Stretch" Margin="20,20,0,0" UseLayoutRounding="True">
                       <TextBlock Foreground="#FF5E5E7C" FontWeight="ExtraBold" FontSize="18" FontFamily="Verdana" Text="Save As"/>
                       <Rectangle Fill="Gray" HorizontalAlignment="Left" Height="1" Width="410"/>
                       <StackPanel Margin="0,30,0,0" Orientation="Horizontal">
                           <telerik:RadRibbonButton BorderBrush="Gray" CommandParameter="docx" CornerRadius="3" Height="80" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding SaveCommand}" telerik:RadRichTextBoxRibbonUI.ShouldCloseBackstage="True" VerticalContentAlignment="Center" Width="90">
                               <Image HorizontalAlignment="Center" Source="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/ApplicationMenu/worddoc.png" Stretch="None"/>
                           </telerik:RadRibbonButton>
                           <StackPanel Margin="20 0 0 0">
                               <TextBlock Foreground="#FF5E5E7C" FontWeight="ExtraBold" FontSize="18" Text="Word Document"/>
                               <TextBlock FontSize="13" FontFamily="Verdana" TextWrapping="Wrap" Text="Save the file as a Word document." Width="300"/>
                           </StackPanel>
                       </StackPanel>
                       <StackPanel Margin="0,30,0,0" Orientation="Horizontal">
                           <telerik:RadRibbonButton BorderBrush="Gray" CommandParameter="pdf" CornerRadius="3" Height="80" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding SaveCommand}" telerik:RadRichTextBoxRibbonUI.ShouldCloseBackstage="True" VerticalContentAlignment="Center" Width="90">
                               <Image HorizontalAlignment="Center" Source="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/ApplicationMenu/Pdf.png" Stretch="None"/>
                           </telerik:RadRibbonButton>
                           <StackPanel Margin="20 0 0 0">
                               <TextBlock Foreground="#FF5E5E7C" FontWeight="ExtraBold" FontSize="18" Text="PDF Document"/>
                               <TextBlock FontSize="13" FontFamily="Verdana" TextWrapping="Wrap" Text="Save document as a PDF file." Width="300"/>
                           </StackPanel>
                       </StackPanel>
                       <StackPanel Margin="0,30,0,0" Orientation="Horizontal">
                           <telerik:RadRibbonButton BorderBrush="Gray" CommandParameter="html" CornerRadius="3" Height="80" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding SaveCommand}" telerik:RadRichTextBoxRibbonUI.ShouldCloseBackstage="True" VerticalContentAlignment="Center" Width="90">
                               <Image HorizontalAlignment="Center" Source="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/ApplicationMenu/html.png" Stretch="None"/>
                           </telerik:RadRibbonButton>
                           <StackPanel Margin="20 0 0 0">
                               <TextBlock Foreground="#FF5E5E7C" FontWeight="ExtraBold" FontSize="18" Text="HTML Document"/>
                               <TextBlock FontSize="13" FontFamily="Verdana" TextWrapping="Wrap" Text="Save the file as a HTML document." Width="300"/>
                           </StackPanel>
                       </StackPanel>
                       <StackPanel Margin="0,30,0,0" Orientation="Horizontal">
                           <telerik:RadRibbonButton BorderBrush="Gray" CommandParameter="rtf" CornerRadius="3" Height="80" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding SaveCommand}" telerik:RadRichTextBoxRibbonUI.ShouldCloseBackstage="True" VerticalContentAlignment="Center" Width="90">
                               <Image HorizontalAlignment="Center" Source="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/ApplicationMenu/Rtf.png" Stretch="None"/>
                           </telerik:RadRibbonButton>
                           <StackPanel Margin="20 0 0 0">
                               <TextBlock Foreground="#FF5E5E7C" FontWeight="ExtraBold" FontSize="18" Text="Rich Text Format"/>
                               <TextBlock FontSize="13" FontFamily="Verdana" TextWrapping="Wrap" Text="Save document in Rich Text Format." Width="300"/>
                           </StackPanel>
                       </StackPanel>
                       <StackPanel Margin="0,30,0,0" Orientation="Horizontal">
                           <telerik:RadRibbonButton BorderBrush="Gray" CommandParameter="txt" CornerRadius="3" Height="80" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding SaveCommand}" telerik:RadRichTextBoxRibbonUI.ShouldCloseBackstage="True" VerticalContentAlignment="Center" Width="90">
                               <Image HorizontalAlignment="Center" Source="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/ApplicationMenu/PlainText.png" Stretch="None"/>
                           </telerik:RadRibbonButton>
                           <StackPanel Margin="20 0 0 0">
                               <TextBlock Foreground="#FF5E5E7C" FontWeight="ExtraBold" FontSize="18" Text="Plain text"/>
                               <TextBlock FontSize="13" FontFamily="Verdana" TextWrapping="Wrap" Text="Save document in plain text format." Width="300"/>
                           </StackPanel>
                       </StackPanel>
                       <StackPanel Margin="0,30,0,0" Orientation="Horizontal">
                           <telerik:RadRibbonButton BorderBrush="Gray" CommandParameter="xaml" CornerRadius="3" Height="80" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding SaveCommand}" telerik:RadRichTextBoxRibbonUI.ShouldCloseBackstage="True" VerticalContentAlignment="Center" Width="90">
                               <Image HorizontalAlignment="Center" Source="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/ApplicationMenu/Xaml.png" Stretch="None"/>
                           </telerik:RadRibbonButton>
                           <StackPanel Margin="20 0 0 0">
                               <TextBlock Foreground="#FF5E5E7C" FontWeight="ExtraBold" FontSize="18" Text="XAML Document"/>
                               <TextBlock FontSize="13" FontFamily="Verdana" TextWrapping="Wrap" Text="Save document as a XAML file." Width="300"/>
                           </StackPanel>
                       </StackPanel>
                   </StackPanel>
               </telerik:RadRibbonBackstageItem>
               <telerik:RadRibbonBackstageItem Header="Print" Icon="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/print.png" IsDefault="true">
                   <StackPanel HorizontalAlignment="Stretch" Margin="20,20,0,0" UseLayoutRounding="True">
                       <TextBlock Foreground="#FF5E5E7C" FontWeight="ExtraBold" FontSize="18" FontFamily="Verdana" Text="Print"/>
                       <Rectangle Fill="Gray" HorizontalAlignment="Left" Height="1" Width="410"/>
                       <StackPanel Margin="0,30,0,0" Orientation="Horizontal">
                           <telerik:RadRibbonButton BorderBrush="Gray" CommandParameter="Native" CornerRadius="3" Height="80" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding PrintCommand}" telerik:RadRichTextBoxRibbonUI.ShouldCloseBackstage="True" VerticalContentAlignment="Center" Width="90">
                               <Image HorizontalAlignment="Center" Source="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/ApplicationMenu/pagesetup.png" Stretch="None"/>
                           </telerik:RadRibbonButton>
                           <StackPanel Margin="20 0 0 0">
                               <TextBlock Foreground="#FF5E5E7C" FontWeight="ExtraBold" FontSize="18" Text="Native Print"/>
                               <TextBlock FontSize="13" FontFamily="Verdana" TextWrapping="Wrap" Text="Send the document directly to the default printer without making changes." Width="300"/>
                           </StackPanel>
                       </StackPanel>
                   </StackPanel>
               </telerik:RadRibbonBackstageItem>
           </telerik:RadRibbonBackstage>
       </telerik:RadRichTextBoxRibbonUI.Backstage>
       <telerik:RadRichTextBoxRibbonUI.ContextualGroups>
           <telerik:RadRibbonContextualGroup x:Name="TableTools" Header="Table Tools">
               <telerik:RadRibbonContextualGroup.IsActive>
                   <Binding Converter="{StaticResource EditingContextTypeToBoolConverter}" Mode="OneWay" Path="AssociatedRichTextBox.CurrentEditingContext.Type">
                       <Binding.ConverterParameter>
                           <telerik:EditingContextTypes>Table</telerik:EditingContextTypes>
                       </Binding.ConverterParameter>
                   </Binding>
               </telerik:RadRibbonContextualGroup.IsActive>
           </telerik:RadRibbonContextualGroup>
           <telerik:RadRibbonContextualGroup x:Name="HeaderFooterTools" Header="Header & Footer Tools">
               <telerik:RadRibbonContextualGroup.IsActive>
                   <Binding Converter="{StaticResource EditingContextTypeToBoolConverter}" Mode="OneWay" Path="AssociatedRichTextBox.CurrentEditingContext.Type">
                       <Binding.ConverterParameter>
                           <telerik:EditingContextTypes>HeaderFooter</telerik:EditingContextTypes>
                       </Binding.ConverterParameter>
                   </Binding>
               </telerik:RadRibbonContextualGroup.IsActive>
           </telerik:RadRibbonContextualGroup>
       </telerik:RadRichTextBoxRibbonUI.ContextualGroups>
       <telerik:RadRichTextBoxRibbonUI.QuickAccessToolBar>
           <telerik:QuickAccessToolBar HorizontalAlignment="Left" Width="90">
               <telerik:RadRibbonButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding SaveCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/save.png" Text="Save"/>
               <telerik:RadRibbonSplitButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding UndoCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/undo.png" Text="Undo">
                   <telerik:RadRibbonSplitButton.DropDownContent>
                       <telerik:MultipleUndoControl telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding MultipleUndoCommand}"/>
                   </telerik:RadRibbonSplitButton.DropDownContent>
               </telerik:RadRibbonSplitButton>
               <telerik:RadRibbonButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding RedoCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/redo.png" Text="Redo"/>
           </telerik:QuickAccessToolBar>
       </telerik:RadRichTextBoxRibbonUI.QuickAccessToolBar>
       <!--<telerik:RadRibbonTab Header="Tools">
           <telerik:RadRibbonGroup Header="Clipboard">
               <telerik:RadCollapsiblePanel>
                   <telerik:RadRibbonButton CollapseToSmall="WhenGroupIsMedium" telerik:ScreenTip.Description="Cut the selection and put it on the Clipboard." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding CutCommand}" Size="Medium" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/cut.png" Text="Cut" telerik:ScreenTip.Title="Cut"/>
                   <telerik:RadRibbonButton CollapseToSmall="WhenGroupIsMedium" telerik:ScreenTip.Description="Copy the selection and put it on the Clipboard." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding CopyCommand}" Size="Medium" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/copy.png" Text="Copy" telerik:ScreenTip.Title="Copy"/>
                   <telerik:RadRibbonButton CollapseToSmall="WhenGroupIsMedium" telerik:ScreenTip.Description="Paste the contents of the Clipboard." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding PasteCommand}" Size="Medium" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/paste.png" Text="Paste" telerik:ScreenTip.Title="Paste"/>
               </telerik:RadCollapsiblePanel>
           </telerik:RadRibbonGroup>
           <telerik:RadRibbonGroup DialogLauncherVisibility="Visible" telerik:ScreenTip.Description="Show the font dialog box." Header="Font" telerik:ScreenTip.Icon="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/FontDialog.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ShowFontPropertiesDialogCommand}" telerik:ScreenTip.Title="Font">
               <telerik:RadOrderedWrapPanel>
                   <StackPanel Orientation="Horizontal">
                       <telerik:RadRibbonComboBox CanAutocompleteSelectItems="False" CanKeyboardNavigationSelectItems="False" CommandParameter="{Binding SelectedValue, RelativeSource={RelativeSource Self}}" telerik:ScreenTip.Description="Change the font family." IsReadOnly="True" ItemsSource="{Binding RegisteredFonts, Source={StaticResource FontFamiliesProvider}}" MaxDropDownHeight="400" OpenDropDownOnFocus="True" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ChangeFontFamilyCommand}" telerik:ScreenTip.Title="Font" Width="132"/>
                       <telerik:RadRibbonComboBox CanAutocompleteSelectItems="False" CanKeyboardNavigationSelectItems="False" CommandParameter="{Binding SelectedItem.Tag, RelativeSource={RelativeSource Self}}" telerik:ScreenTip.Description="Change the font size." IsEditable="True" IsReadOnly="True" IsTextSearchEnabled="False" MaxDropDownHeight="400" OpenDropDownOnFocus="True" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ChangeFontSizeCommand}" telerik:ScreenTip.Title="Font Size" Width="65">
                           <telerik:RadRibbonComboBoxItem Content="8" Tag="10.67"/>
                           <telerik:RadRibbonComboBoxItem Content="9" Tag="12"/>
                           <telerik:RadRibbonComboBoxItem Content="10" Tag="13.34"/>
                           <telerik:RadRibbonComboBoxItem Content="11" Tag="14.67"/>
                           <telerik:RadRibbonComboBoxItem Content="12" Tag="16"/>
                           <telerik:RadRibbonComboBoxItem Content="14" Tag="18.67"/>
                           <telerik:RadRibbonComboBoxItem Content="16" Tag="21.33"/>
                           <telerik:RadRibbonComboBoxItem Content="18" Tag="24"/>
                           <telerik:RadRibbonComboBoxItem Content="20" Tag="26.67"/>
                           <telerik:RadRibbonComboBoxItem Content="22" Tag="29.33"/>
                           <telerik:RadRibbonComboBoxItem Content="24" Tag="32"/>
                           <telerik:RadRibbonComboBoxItem Content="26" Tag="34.67"/>
                           <telerik:RadRibbonComboBoxItem Content="28" Tag="37.33"/>
                           <telerik:RadRibbonComboBoxItem Content="36" Tag="48"/>
                           <telerik:RadRibbonComboBoxItem Content="48" Tag="64"/>
                           <telerik:RadRibbonComboBoxItem Content="72" Tag="96"/>
                       </telerik:RadRibbonComboBox>
                   </StackPanel>
                   <telerik:RadButtonGroup>
                       <telerik:RadRibbonButton telerik:ScreenTip.Description="Increase the font size." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding IncrementFontSizeCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/font-increasesize.png" telerik:ScreenTip.Title="Grow Font"/>
                       <telerik:RadRibbonButton telerik:ScreenTip.Description="Decrease the font size." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding DecrementFontSizeCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/font-decreasesize.png" telerik:ScreenTip.Title="Shrink Font"/>
                   </telerik:RadButtonGroup>
                   <telerik:RadButtonGroup>
                       <telerik:RadRibbonButton telerik:ScreenTip.Description="Clear all the formatting from the selection, leaving only the plain text." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ClearAllFormattingCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/ClearFormatting16.png" telerik:ScreenTip.Title="Clear All Formatting"/>
                   </telerik:RadButtonGroup>
                   <telerik:RadButtonGroup>
                       <telerik:RadRibbonToggleButton telerik:ScreenTip.Description="Make the selected text bold." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ToggleBoldCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/bold.png" telerik:ScreenTip.Title="Bold"/>
                       <telerik:RadRibbonToggleButton telerik:ScreenTip.Description="Italicize the selected text." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ToggleItalicCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/italic.png" telerik:ScreenTip.Title="Italic"/>
                       <telerik:RadRibbonSplitButton telerik:ScreenTip.Description="Underline the selected text." IsToggle="True" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ToggleUnderlineCommand}" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/underline.png" telerik:ScreenTip.Title="Underline">
                           <telerik:RadRibbonSplitButton.DropDownContent>
                               <telerik:RadGallery Height="210" ItemWidth="156" ItemHeight="26" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ChangeUnderlineDecorationCommand}" ViewportWidth="157">
                                   <telerik:RadGalleryItem Image="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/underline1.png" Tag="Line"/>
                                   <telerik:RadGalleryItem Image="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/underline2.png" Tag="DoubleLine"/>
                                   <telerik:RadGalleryItem Image="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/underline3.png" Tag="ThickLine"/>
                                   <telerik:RadGalleryItem Image="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/underline4.png" Tag="DottedLine"/>
                                   <telerik:RadGalleryItem Image="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/underline5.png" Tag="DashedLine"/>
                                   <telerik:RadGalleryItem Image="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/underline6.png" Tag="DotDashedLine"/>
                                   <telerik:RadGalleryItem Image="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/underline7.png" Tag="DotDotDashedLine"/>
                                   <telerik:RadGalleryItem Image="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/underline8.png" Tag="Wave"/>
                               </telerik:RadGallery>
                           </telerik:RadRibbonSplitButton.DropDownContent>
                       </telerik:RadRibbonSplitButton>
                       <telerik:RadRibbonToggleButton telerik:ScreenTip.Description="Draw a line through the middle of the selected text." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ToggleStrikethroughCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/Strikethrough16.png" telerik:ScreenTip.Title="Strikethrough"/>
                       <telerik:RadRibbonToggleButton telerik:ScreenTip.Description="Create small letters below the text baseline." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ToggleSubscriptCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/subscript.png" telerik:ScreenTip.Title="Subscript"/>
                       <telerik:RadRibbonToggleButton telerik:ScreenTip.Description="Create small text above the line of text." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ToggleSuperscriptCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/superscript.png" telerik:ScreenTip.Title="Superscript"/>
                   </telerik:RadButtonGroup>
                   <telerik:RadButtonGroup>
                       <telerik:HighlightColorPicker AutomaticColor="Transparent" BorderThickness="0" telerik:ScreenTip.Description="Make text look like it was marked with a highlighter pen." Image="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/highlight.png" NoColorText="No color" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ChangeFontHighlightColorCommand}" SelectedColor="Yellow" telerik:ScreenTip.Title="Text Highlight Color"/>
                       <telerik:HighlightColorPicker BorderThickness="0" telerik:ScreenTip.Description="Change the text color." Image="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/FontForeColor.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ChangeFontForeColorCommand}" SelectedColor="Red" telerik:ScreenTip.Title="Font Color"/>
                   </telerik:RadButtonGroup>
               </telerik:RadOrderedWrapPanel>
           </telerik:RadRibbonGroup>
           <telerik:RadRibbonGroup DialogLauncherVisibility="Visible" telerik:ScreenTip.Description="Show the Paragraph dialog box." Header="Paragraph" telerik:ScreenTip.Icon="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/PropertiesDialog.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ShowParagraphPropertiesDialogCommand}" telerik:ScreenTip.Title="Paragraph">
               <telerik:RadOrderedWrapPanel>
                   <telerik:RadButtonGroup>
                       <telerik:RadRibbonToggleButton telerik:ScreenTip.Description="Start a bulleted list." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ToggleBulletsCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/list-bullets.png" telerik:ScreenTip.Title="Bullets"/>
                       <telerik:RadRibbonToggleButton telerik:ScreenTip.Description="Start a numbered list." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ToggleNumberedCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/list-numbered.png" telerik:ScreenTip.Title="Numbering"/>
                       <telerik:RadRibbonDropDownButton telerik:ScreenTip.Description="Start a multilevel list. Click the arrow to choose different multilevel list styles." Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/MultilevelList.png" telerik:ScreenTip.Title="Multilevel List">
                           <telerik:RadRibbonDropDownButton.DropDownContent>
                               <StackPanel>
                                   <ScrollViewer MaxHeight="565">
                                       <StackPanel>
                                           <telerik:RadGroupHeader Content="List Library"/>
                                           <telerik:RadGallery Height="176" ItemWidth="88" ItemHeight="88" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ChangeListStyleCommand}" ScrollViewer.VerticalScrollBarVisibility="Disabled" ViewportWidth="266">
                                               <telerik:RadGalleryItem Image="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/MultilevelListNone.png" Tag="None"/>
                                               <telerik:RadGalleryItem Image="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/MultilevelListBulleted.png" Tag="Bulleted"/>
                                               <telerik:RadGalleryItem Image="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/MultilevelListNumbered.png" Tag="Numbered"/>
                                               <telerik:RadGalleryItem Image="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/MultilevelListNumberedParenthesis.png" Tag="NumberedParenthesis"/>
                                               <telerik:RadGalleryItem Image="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/MultilevelListNumberedHierarchical.png" Tag="NumberedHierarchical"/>
                                           </telerik:RadGallery>
                                           <telerik:ListStylesGallery AssociatedRichTextBox="{Binding AssociatedRichTextBox, Mode=OneWay}"/>
                                       </StackPanel>
                                   </ScrollViewer>
                                   <telerik:RadRibbonButton HorizontalAlignment="Stretch" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ShowDefineNewListStyleDialogCommand}" Size="Medium" Text="Define New List Style ..."/>
                               </StackPanel>
                           </telerik:RadRibbonDropDownButton.DropDownContent>
                       </telerik:RadRibbonDropDownButton>
                   </telerik:RadButtonGroup>
                   <telerik:RadButtonGroup>
                       <telerik:RadRibbonButton telerik:ScreenTip.Description="Decrease the indent level of the paragraph." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding DecrementParagraphLeftIndentCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/outdent.png" telerik:ScreenTip.Title="Decrease Indent"/>
                       <telerik:RadRibbonButton telerik:ScreenTip.Description="Increase the indent level of the paragraph." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding IncrementParagraphLeftIndentCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/indent.png" telerik:ScreenTip.Title="Increase Indent"/>
                   </telerik:RadButtonGroup>
                   <telerik:RadButtonGroup>
                       <telerik:RadRibbonToggleButton telerik:ScreenTip.Description="Set the direction of text to be displayed from left to right." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ChangeParagraphFlowDirectionCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/LeftToRightFlowDirection.png" Text="Left-to-Right Text Direction" telerik:ScreenTip.Title="Left-To-Right Text Direction">
                           <telerik:RadRibbonToggleButton.CommandParameter>
                               <FlowDirection>LeftToRight</FlowDirection>
                           </telerik:RadRibbonToggleButton.CommandParameter>
                       </telerik:RadRibbonToggleButton>
                       <telerik:RadRibbonToggleButton telerik:ScreenTip.Description="Set the direction of text to be displayed from right to left." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ChangeParagraphFlowDirectionCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/RightToLeftFlowDirection.png" Text="Right-to-Left Text Direction" telerik:ScreenTip.Title="Right-To-Left Text Direction">
                           <telerik:RadRibbonToggleButton.CommandParameter>
                               <FlowDirection>RightToLeft</FlowDirection>
                           </telerik:RadRibbonToggleButton.CommandParameter>
                       </telerik:RadRibbonToggleButton>
                   </telerik:RadButtonGroup>
                   <telerik:RadButtonGroup>
                       <telerik:RadRibbonToggleButton telerik:ScreenTip.Description="Show paragraph marks and other hidden formatting symbols." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ToggleFormattingSymbolsCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/formatting-symbols.png" telerik:ScreenTip.Title="Show/Hide Formatting Symbols"/>
                   </telerik:RadButtonGroup>
                   <telerik:RadButtonGroup>
                       <telerik:RadRibbonToggleButton CommandParameter="Left" telerik:ScreenTip.Description="Align text to the left." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ChangeTextAlignmentCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/alignleft.png" Text="Align Left" telerik:ScreenTip.Title="Align Text Left"/>
                       <telerik:RadRibbonToggleButton CommandParameter="Center" telerik:ScreenTip.Description="Center text." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ChangeTextAlignmentCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/aligncenter.png" Text="Center" telerik:ScreenTip.Title="Center"/>
                       <telerik:RadRibbonToggleButton CommandParameter="Right" telerik:ScreenTip.Description="Align text to the right." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ChangeTextAlignmentCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/alignright.png" Text="Align Right" telerik:ScreenTip.Title="Align Text Right"/>
                       <telerik:RadRibbonToggleButton CommandParameter="Justify" telerik:ScreenTip.Description="Align text to both left and right margins, adding extra space between words as necessary." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ChangeTextAlignmentCommand}" Size="Small" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/alignjustify.png" Text="Justify" telerik:ScreenTip.Title="Justify"/>
                   </telerik:RadButtonGroup>
                   <telerik:RadButtonGroup>
                       <telerik:HighlightColorPicker AutomaticColor="Transparent" BorderThickness="0" telerik:ScreenTip.Description="Color the background behind the selected paragraph." Image="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/ParagraphBackgroundColor.png" NoColorText="No color" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ChangeParagraphBackgroundColorCommand}" SelectedColor="Transparent" telerik:ScreenTip.Title="Shading"/>
                   </telerik:RadButtonGroup>
               </telerik:RadOrderedWrapPanel>
           </telerik:RadRibbonGroup>
           <telerik:RadRibbonGroup Header="Editing & Proofing">
               <telerik:RadCollapsiblePanel>
                   <telerik:RadRibbonButton CollapseToSmall="WhenGroupIsMedium" telerik:ScreenTip.Description="Find or replace text in the document." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ShowFindReplaceDialogCommand}" Size="Medium" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/Find.png" Text="Find/Replace" telerik:ScreenTip.Title="Find/Replace"/>
                   <telerik:RadRibbonToggleButton CollapseToSmall="WhenGroupIsMedium" telerik:ScreenTip.Description="Enable/Disable spell checking." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ToggleSpellCheckingCommand}" Size="Medium" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/EnableSpellCheck.png" Text="Enable Spell Check" telerik:ScreenTip.Title="Spell Check"/>
                   <telerik:RadRibbonButton CollapseToSmall="WhenGroupIsMedium" telerik:ScreenTip.Description="Open context menu on next spelling error." telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding OpenContextMenuOnNextSpellingErrorCommand}" Size="Medium" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/FindNextSpellingError.png" Text="Find Next Error" telerik:ScreenTip.Title="Next Error"/>
               </telerik:RadCollapsiblePanel>
           </telerik:RadRibbonGroup>
           <telerik:RadRibbonGroup Header="Styles">
               <telerik:StylesGallery AssociatedRichTextBox="{Binding AssociatedRichTextBox, Mode=OneWay}"/>
               <telerik:RadRibbonButton telerik:ScreenTip.Description="Change the set of styles, colors, fonts and paragraph spacing used in this document." LargeImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/ChangeStyles.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ShowManageStylesDialogCommand}" Size="Large" Text="Change Styles" telerik:ScreenTip.Title="Change Styles"/>
           </telerik:RadRibbonGroup>
           <telerik:RadRibbonGroup/>
       </telerik:RadRibbonTab>
       <telerik:RadRibbonTab Header="Insert">
           <telerik:RadRibbonGroup Header="Pages">
               <telerik:RadRibbonButton telerik:ScreenTip.Description="Start the next page at the current position." LargeImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/PageBreak.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding InsertPageBreakCommand}" Size="Large" Text="Page Break" telerik:ScreenTip.Title="Page Break"/>
           </telerik:RadRibbonGroup>
           <telerik:RadRibbonGroup Header="Tables">
               <telerik:RadRibbonDropDownButton CollapseToMedium="WhenGroupIsMedium" Command="{Binding InsertTableCommand}" telerik:ScreenTip.Description="Insert a table into the document." LargeImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/InsertTable.png" Size="Large" Text="Table" telerik:ScreenTip.Title="Table">
                   <telerik:RadRibbonDropDownButton.DropDownContent>
                       <StackPanel>
                           <telerik:RadRibbonButton ClickMode="Press">
                               <telerik:TableSizePicker Command="{Binding InsertTableCommand}"/>
                           </telerik:RadRibbonButton>
                           <telerik:RadMenuItem IsSeparator="True"/>
                           <telerik:RadRibbonButton HorizontalAlignment="Stretch" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ShowInsertTableDialogCommand}" Size="Medium" SmallImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/InsertTable.png" Text="Insert Table..."/>
                       </StackPanel>
                   </telerik:RadRibbonDropDownButton.DropDownContent>
               </telerik:RadRibbonDropDownButton>
           </telerik:RadRibbonGroup>
           <telerik:RadRibbonGroup Header="Illustrations">
               <telerik:RadRibbonButton telerik:ScreenTip.Description="Insert a picture from a file." LargeImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/Picture.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding InsertPictureCommand}" Size="Large" Text="Picture" telerik:ScreenTip.Title="Insert Picture from File"/>
           </telerik:RadRibbonGroup>
           <telerik:RadRibbonGroup Header="Links">
               <telerik:RadRibbonButton telerik:ScreenTip.Description="Create a link to a Web page, a picture or an e-mail address." LargeImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/inserthyperlink.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ShowInsertHyperlinkDialogCommand}" Size="Large" Text="Hyperlink" telerik:ScreenTip.Title="Insert Hyperlink"/>
               <telerik:RadRibbonButton telerik:ScreenTip.Description="Create a bookmark to assign a name to a specific point in a document." LargeImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/InsertBookmark.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ShowManageBookmarksDialogCommand}" Size="Large" Text="Bookmark" telerik:ScreenTip.Title="Bookmark"/>
               <telerik:RadRibbonButton telerik:ScreenTip.Description="Refer to items such as headings, figures and tables." LargeImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/InsertCrossReference.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ShowInsertCrossReferenceWindowCommand}" Size="Large" Text="Cross-reference" telerik:ScreenTip.Title="Cross-reference"/>
           </telerik:RadRibbonGroup>
           <telerik:RadRibbonGroup Header="Comments">
               <telerik:RadRibbonButton telerik:ScreenTip.Description="Add a comment about the selection." LargeImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/NewComment.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding InsertCommentCommand}" Size="Large" Text="New Comment" telerik:ScreenTip.Title="Insert Comment"/>
           </telerik:RadRibbonGroup>
           <telerik:RadRibbonGroup Header="Header & Footer">
               <telerik:RadRibbonButton telerik:ScreenTip.Description="Edit the header of the document." LargeImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/EditHeader.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding EditHeaderCommand}" Size="Large" Text="Header" telerik:ScreenTip.Title="Header"/>
               <telerik:RadRibbonButton telerik:ScreenTip.Description="Edit the footer of the document." LargeImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/EditFooter.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding EditFooterCommand}" Size="Large" Text="Footer" telerik:ScreenTip.Title="Footer"/>
           </telerik:RadRibbonGroup>
           <telerik:RadRibbonGroup Header="Text">
               <telerik:RadRibbonButton telerik:ScreenTip.Description="Insert the current date or time into the current document." LargeImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/InsertDateTime.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ShowInsertDateTimeDialogCommand}" Size="Large" Text="Date & Time" telerik:ScreenTip.Title="Insert Date and Time"/>
               <telerik:RadRibbonButton telerik:ScreenTip.Description="Insert page numbers into the document." LargeImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/InsertPageNumber.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding InsertPageFieldCommand}" Size="Large" Text="Page Number" telerik:ScreenTip.Title="Insert Page Number"/>
               <telerik:RadRibbonButton telerik:ScreenTip.Description="Insert block containing formatted programming source code." LargeImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/CodeBlock.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ShowCodeFormattingDialogCommand}" Size="Large" Text="Code" telerik:ScreenTip.Title="Insert Code Block"/>
           </telerik:RadRibbonGroup>
           <telerik:RadRibbonGroup Header="Symbols">
               <telerik:RadRibbonButton telerik:ScreenTip.Description="Insert symbols that are not on your keyboard, such as copyright symbols, trademark symbols, paragraph marks, and Unicode characters." LargeImage="pack://application:,,,/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/Symbol.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding ShowInsertSymbolWindowCommand}" Size="Large" Text="Symbol" telerik:ScreenTip.Title="Insert Symbol"/>
           </telerik:RadRibbonGroup>
       </telerik:RadRibbonTab>-->
   </telerik:RadRichTextBoxRibbonUI>

[Kiril Vandov]

Hello Ahror,

I am not sure that I understand your question. The loading time of an application varies on the complexity of the application, the machine on which is running, the available resources for that application, the current load usage over the machine and a lot more factors. Also how exactly you are calculating that time-frame.

I hope this information helps.

Kind regards,
Kiril Vandov
Telerik by Progress