For a PDF document with 21 or more pages, it’s essential to incorporate bookmarks that mirror the accessible document structure. This ensures that individuals using assistive technology have a smoother navigation experience within the PDF document.
Bookmarks Actions
Create Bookmarks
Run 
Create Bookmarks to automatically generate bookmarks from a tag tree hierarchy.
- Define the Tags types for each bookmark Level.
- Check Overwrite if you want bookmarks to be generated even if bookmarks already exist.
Bookmarks are added to the end of the current bookmark tree. If necessary, use the 
Delete Bookmarks action to clear the existing bookmarks before executing this action.
Delete Bookmarks
Delete Bookmarks clears a bookmark structure in the document.
Bookmarks panel
Bookmark view
Add Bookmark
Add Bookmark adds an empty bookmark as a sibling of the selected bookmark. After adding a new bookmark, you can set a bookmark’s action in the 
Properties widget.
Delete Bookmark
Delete Bookmark deletes selected bookmarks.
Edit Bookmark
Edit Bookmark to change a bookmark name.
Bookmark Properties
Click on Properties to view available bookmark properties for editing. You can change the bookmark name, bookmark color, or bookmark font styling from this view.
Bookmark Actions
Each bookmark can have an associated list of actions. You can add, remove and edit bookmark actions in the Actions tab within the Properties view.
