Click a National or Community name in the list and the map will zoom to that geographic extent.
To create your own spatial bookmark, position the map to the extent you would like to bookmark and enter the new bookmark name in the text box. Click the plus to bookmark the current view.
Your new spatial bookmark will appear in the Enhanced Bookmarks list and function as the other bookmarks do.
NOTE: Your new spatial bookmark is saved in your browser. Clearing your browser cache will delete your bookmark.