The Sidebar
The Sidebar is PDF Annotator's way of allowing rapid access to a large number of functions directly next to the document window.
Showing and Hiding the Sidebar
To enable the Sidebar, just click on any of its tabs - or example: Pages, Bookmarks, Annotations, or one of the Toolbox tabs. You can also choose the View Sidebar menu command.
Press the Close button in the upper right corner of the Sidebar to remove it from view. A single click on the divider between the Sidebar and the document window will also turn it off. You can control the size of the Sidebar by moving the divider.