# Properties | Property | Description | | ---------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- | | **HorizontalScrollState** | Gets or sets the display state of the horizontal scroll bar. | | **VerticalScrollState** | Gets or sets the display state of the vertical scroll bar. | | **EnableThumbnails** | Gets or sets whether the thumbnail element is visible. | | **ContainerElement** | Gets the which represents the elements container of the control. | | **PdfViewerElement** | Gets the which represents the main element of the control. | | **AnnotationsColor** | Gets or sets the background color of the annotations when they are pressed. | | **FitToWidth** | Fit to window width | | **FitFullPage** | Fit one full page to control | | **SelectionColor** | Gets or sets the color that highlights the current selection. | | **ScaleFactor** | Gets or sets the factor by which the document is scaled. | | **Document** | Gets the currently loaded | | **ReadingMode** | Gets or sets whether the entire document is loaded at the beginning or pages are loaded on demand. | | **RadContextMenu** | Gets or sets the associated . By default this is . | | **ViewerMode** | Gets or sets the current viewer mode - Pan, TextSelection or None. | | **BackColor** | RadPdfViewer consists of multiple visual elements and separate settings are provided to customize their appearance. Current BackColor property might be ignored. | | **ForeColor** | RadPdfViewer consists of multiple visual elements and separate settings are provided to customize their appearance. Current ForeColor property might be ignored. | | **ThumbnailListWidth** | Get or Set the width of the Thumbnail list | | **PrintScalePageToPaperSize** | Scale page when printing to fit the paper size without keeping the aspect ratio. | | **PrintOrientation** | Set or get the page orientation when printing. | | **PdfViewerElement.AllowSignatureDialog** | Allows you to disable the SignatureDialog and SingSignatureDialog | | **PdfViewerElement.AllowSignSignatureDialog** | Allows you to disable the document signing. | | RadPdfViewerElement.**AsyncRender** | Enable or disable the async rendering of pages. | | RadPdfViewerElement.**CachePaint** | Enable or disable the cached painting of pages. | | **UseBufferedPrinting** \[Released in R2 2021] | If true, the page will be printed in an image that will be send to the printer at once. Loss of quality is possible. | # Methods | Method | Description | | -------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | **Select** | Creates selection from start position to end position. | | **PageUp** | Navigates to the previous page. | | **PageDown** | Navigates to the next page. | | **LoadDocument(string path)** | Loads a PDF document from a specified file name. | | **LoadDocument(Stream stream)** | Loads a PDF document from a specified stream. | | **UnloadDocument** | Unload the current PDF document. | | **ShowThumbnails** | Show the Pdf document's thumbnails | | **HideThumbnails** | Hide the Pdf document's thumbnails | | **Print** | Directly prints the document to the default printer. | | **Print(bool showPrinterSettings)** | Prints the document with the parameter indicating whether printer settings dialog should be shown. | | **Print(bool showPrinterSettings, RadPrintDocument document)** | Prints the document. The first parameter indicating whether printer settings dialog should be shown. The second parameter provides an option for supplying a RadPrintDocument object controlling the printing process . | | **PrintPreview** | Shows a RadPrintPreviewDialog for editing the print settings. | | **PrintPreview(RadPrintDocument document)** | Shows a RadPrintPreviewDialog for editing the print settings with an option for a RadPrintDocument instance. | # Events > note As of **R1 2021** **RadPdfViewerElement** offers the cancelable **SignatureDialogShowing** and **SignSignatureDialogShowing** events. They allow customizing or changing the signature dialogs in RadPdfViewer. | Event | Description | | ------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | **DocumentLoaded** | Fires when the document has finished loading. | | **DataError** | Fires when an internal exception in during loading parts of the document occurs. If the event is not handled, a default error message box will be shown, otherwise the message box will not show and handling the error should be done in the event handler. | | **AnnotationClicked** | Fires when a link or a bookmark was clicked. | | **FitToWidthChanged** | Fires when the FitToWidth property has changed. | | **FitFullPageChanged** | Fires when the FitFullPage property has changed. | | **ScaleFactorChanged** | Fires when the ScaleFactor property has changed. | | **CaretPositionChanged** | Fires when the caret changes its position. | | **SelectionChanged** | Fires when the text selection has changed. | | **PageElementCreating** | Fires when a is being created. Allows for replacing it with custom page element. | | **ViewerModeChanged** | Fires when the ViewerMode property has changed. | ## See Also * [Properties](https://docs.telerik.com/devtools/winforms/api/telerik.wincontrols.ui.radpdfviewer.html#properties) * [Methods](https://docs.telerik.com/devtools/winforms/api/telerik.wincontrols.ui.radpdfviewer.html#methods) * [Events](https://docs.telerik.com/devtools/winforms/api/telerik.wincontrols.ui.radpdfviewer.html#events)