The Bookmark menu initially contains one command: Define. This command places a bookmark in the title at the current topic and lets you assign a name to the bookmark. Once assigned, the bookmark name appears in the Bookmark menu. You can select this name from the menu to move directly to the topic associated with the bookmark.
You can also delete bookmarks using the Define command.
Note :
All bookmarks are recorded in a file called VIEWER.BMK. Storing bookmarks in this file enables bookmarks to remain in effect between Viewer sessions.