# Outline Panel

Learn about outline panel feature in PrintDocument from this WinForms documentation helpfile.

## Content



Both the PrintPreview and RibbonPreview libraries provide Outline panel feature to display the project hierarchy in a document. Using outlines in your document-preview applications can enhance the scope of navigation within the document. In the [Outline](/componentone/docs/win/online-printdocument/print-document-library/outline) topic of PrintDocument, you learned how to add outline nodes to highlights the important regions in a document. Likewise, the Outline panel lets you select those outline nodes to easily navigate to that region in the document.

![Snapshot of OutlinePanel](https://cdn.mescius.io/document-site-files/images/6772f728-508e-4e80-9394-208f07d64beb/images/outline-pane-preview.png)

The **PrintPreviewcontrol** by default contains a outline pane, but you can also use the **PreviewOutlineView** control, and connect it with a PreviewPane control while creating a previewing application of your own. You can customize the caption of the outline panel using the **OutlineViewCaption.**

![Snapshot of OutlinePanel caption](https://cdn.mescius.io/document-site-files/images/6772f728-508e-4e80-9394-208f07d64beb/images/caption-outlienpane-changed.png)