# Keyboard Support

Telerik **RadRichTextEditor** for WinForms supports shortcuts. There are default key-bindings defined for the most widely used operations, namely:

| **Action**                                                   | **Hotkey**           |
| ------------------------------------------------------------ | -------------------- |
| Copy                                                         | Ctrl+C               |
| Paste                                                        | Ctrl+V               |
| Cut                                                          | Ctrl+X               |
| Delete                                                       | Delete               |
| Undo                                                         | Ctrl+Z               |
| Redo                                                         | Ctrl+Y               |
| InsertLineBreak                                              | Shift+Enter          |
| InsertPageBreak                                              | Ctrl+Enter           |
| ToggleBold                                                   | Ctrl+B, Ctrl+Shift+B |
| ToggleItalic                                                 | Ctrl+I, Ctrl+Shift+I |
| ToggleSuperscript                                            | Ctrl+'+'             |
| ToggleSubscript                                              | Ctrl+Shift+'+'       |
| ToggleUnderline                                              | Ctrl+U               |
| ClearFormatting                                              | Ctrl+Space           |
| Copy Formatting                                              | Ctrl+Shift+C         |
| Paste Formatting                                             | Ctrl+Shift+V         |
| Cancel Format Painter                                        | Esc                  |
| ChangeTextAlignment with parameter RadTextAlignment.Justify  | Ctrl+J               |
| ChangeTextAlignment with parameter RadTextAlignment.Right    | Ctrl+R               |
| ChangeTextAlignment with parameter RadTextAlignment.Left     | Ctrl+L               |
| ChangeTextAlignment with parameter RadTextAlignment.Center   | Ctrl+E               |
| SelectAll                                                    | Ctrl+A               |
| MoveCaret with parameter MoveCaretDirections.Previous        | Left Arrow           |
| MoveCaret with parameter MoveCaretDirections.Next            | Right Arrow          |
| MoveCaret with parameter MoveCaretDirections.PreviousWord    | Ctrl+Left Arrow      |
| MoveCaret with parameter MoveCaretDirections.NextWord        | Ctrl+Right Arrow     |
| MoveCaret with parameter MoveCaretDirections.Up              | Upper Arrow          |
| MoveCaret with parameter MoveCaretDirections.Down            | Down Arrow           |
| MoveCaret with parameter MoveCaretDirections. ParagraphStart | Ctrl+Upper Arrow     |
| MoveCaret with parameter MoveCaretDirections. ParagraphEnd   | Ctrl+Down Arrow      |
| MoveCaret with parameter MoveCaretDirections.Home            | Home                 |
| MoveCaret with parameter MoveCaretDirections.DocumentStart   | Ctrl+Home            |
| MoveCaret with parameter MoveCaretDirections.End             | End                  |
| MoveCaret with parameter MoveCaretDirections.DocumentEnd     | Ctrl+End             |
| MoveCaret with parameter MoveCaretDirections.PageUp          | PageUp               |
| MoveCaret with parameter MoveCaretDirections.PageDown        | PageDown             |
| ShowFindReplaceDialog                                        | Ctrl+F               |
| ShowFontPropertiesDialog                                     | Ctrl+D               |
| ShowInsertHyperlinkDialog                                    | Ctrl+K               |

Now, these key shortcuts can be overridden and customized to the liking of the user. This can be achieved by creating a custom **RichTextEditorInputBehavior** descendant:

```C#
public class MyInputBehavior : Telerik.WinForms.RichTextEditor.RichTextEditorInputBehavior
{
    public MyInputBehavior(RadRichTextBox editor) : base(editor)
    {
    }
    protected override void PerformCopyOperation(System.Windows.Forms.KeyEventArgs e)
    {
        base.PerformCutOperation(e);
    }      
}

```

```VB.NET
Public Class MyInputBehavior
    Inherits Telerik.WinForms.RichTextEditor.RichTextEditorInputBehavior

    Public Sub New(ByVal editor As RadRichTextBox)
        MyBase.New(editor)
    End Sub
    Protected Overrides Sub PerformCopyOperation(ByVal e As System.Windows.Forms.KeyEventArgs)
        MyBase.PerformCutOperation(e)
    End Sub
End Class

```

The default behavior can be changed like this:

```C#
radRichTextEditor1.InputHandler = new MyInputBehavior(radRichTextEditor1.RichTextBoxElement);
        
```

```VB.NET
radRichTextEditor1.InputHandler = New MyInputBehavior(radRichTextEditor1.RichTextBoxElement)

```

Another way to customize the control behavior is to use the **PreviewEditorKeyDown** event. For example,          pressing **RightAlt** causes **Control** and **Alt** to be sent as arguments to the **PreviewKeyDown** event. Thus, **RightAlt**+**E** triggers a formatting command for paragraph alignment instead of inputting the **ę** character. In that case, you can handle the **PreviewEditorKeyDown** event in the following way:

```C#
void RichTextBoxElement_PreviewEditorKeyDown(object sender, PreviewEditorKeyEventArgs e)
{
    if ((Keyboard.IsKeyDown(Key.LeftShift) || Keyboard.IsKeyDown(Key.RightShift)))
    {
        e.SuppressDefaultAction = true;
    }
}

```

```VB.NET
    Private Sub RichTextBoxElement_PreviewEditorKeyDown(ByVal sender As Object, ByVal e As PreviewEditorKeyEventArgs)
        If (Keyboard.IsKeyDown(Key.LeftShift) OrElse Keyboard.IsKeyDown(Key.RightShift)) Then
            e.SuppressDefaultAction = True
        End If
    End Sub

```

## See Also

* [Clipboard Support](https://www.telerik.com/products/winforms/documentation/controls/richtexteditor/features/clipboard-support)

* [Formatting API](https://www.telerik.com/products/winforms/documentation/controls/richtexteditor/getting-started/formatting-api)