PDF Viewer Navigation Pane
- 4 minutes to read
The Navigation pane displays thumbnails, bookmarks, attachments, and annotations. Click the corresponding tab in the pane to open or close the built-in panel.
Built-In Panels
Bookmarks
This panel displays bookmarks from the PDF file.
The Options drop-down list shows bookmark settings.
The table below describes bookmark settings and lists API used to specify corresponding options in code.
| Option | Description | API |
|---|---|---|
| Expand Current Bookmarks | Expands the selected bookmark. | PdfOutlinesExpandCurrentCommand |
| Collapse/Expand Top-Level Bookmarks | Expands or collapses all bookmarks. | PdfOutlinesExpandCollapseTopLevelCommand |
| Hide After Use | Specifies whether to hide the panel after an outline was clicked. | PdfOutlineViewerSettings.HideAfterUse |
| Text Size | Gets or sets the size of bookmark nodes. | PdfOutlineViewerSettings.TextSize |
| Wrap Long Bookmarks | Specifies whether to wrap long bookmark names. | PdfOutlineViewerSettings.UseOutlinesForeColor |
Attachments
This panel displays the list of file attachments in the current PDF file.
When you open an attachment, the Security Warning message appears. Handle the PdfViewer.FileAttachmentOpening event to hide the message box.
Thumbnails
The Page Thumbnails panel displays page thumbnails.
The Options drop-down list shows thumbnail settings. This list can also be accessed from the panel’s context menu.
| Option | Description | Command |
|---|---|---|
| Print Page(s) | Invokes the Print dialog to print pages that correspond to the selected thumbnails. If the panel contains no selected thumbnails, all the pages are printed. | PdfThumbnailsPrintPagesCommand |
| Enlarge Page Thumbnails | Increases page thumbnail size. | PdfEnlargePageThumbnailsCommand |
| Reduce Page Thumbnails | Decreases page thumbnail size. | PdfReducePageThumbnailsCommand |
You can use the zoom slider or Ctrl+Mouse Wheel shortcut to enlarge/reduce thumbnails.
Comments
The Comments panel displays annotations and comments.
You can sort and filter comments by page, author, date, type, check, and review status.
Click an annotation to add a reply to it. Double-click the annotation to edit its contents.
Right-click the annotation and select Set Status to specify the review status. Select None to remove the status.
Click on the checkbox at the comment’s top right corner to flag the comment with a check mark. Check marks are for your personal use, for example, to mark the comment as reviewed. They do not specify whether to print or export the selected comments.
Signatures
The Signatures panel displays signature information and signature validity:
When you open a document, the Document Viewer verifies signatures and display their status in the Signatures panel:
- The check mark icon indicates that the signature is valid.
- The caution triangle icon indicates that signature validity is unknown because the signer’s certificate isn’t on your list of trusted identities.
- The cross icon indicates that the signature is invalid. The document has been altered or corrupted since the signature was applied.
You can also view information about such signature properties as the location of the signature in the document, the signatories that sign the document, the reason that the signature was created, the date time when the document was signed and modified after it was signed, and other information.
Right-click the title line of the signature and select the Show Signature Properties option to invoke the corresponding dialog and see the detailed information about signature properties:
You can also click on Certificate details… to open the Certificate dialog:
In the dialog you can view certificate details, install the certificate to include it in your list of trusted identities, or export the certificate to your trusted or revocation list.
Layers
The Layers panel displays all layers contained in a document. To display a layer, click on its check box. Visible layers are marked with the eye icon.
If a layer has no check box or displays a lock icon, you cannot change its visibility:
Click the “Reset to Initial Visibility” command to reset layer settings and return to the initial document state.
Customization
The PDF Viewer ships with the following API used to customize the navigation pane:
| Action | Properties | Events |
|---|---|---|
| Change pane visibility | PdfViewer.NavigationPaneVisibility PdfViewer.NavigationPaneInitialVisibility |
PdfViewer.NavigationPaneVisibilityChanged |
| Display only specific panels | PdfViewer.NavigationPanePageVisibility | |
| Change active page | PdfViewer.NavigationPaneInitialSelectedPage PdfViewer.NavigationPaneSelectedPage |
PdfViewer.NavigationPaneSelectedPageChanged |
| Specify pane width | PdfViewer.NavigationPaneWidth PdfViewer.NavigationPaneMinWidth |