What is a spatial bookmark?
Spatial bookmarks store a geographic location, so you can refer to it at a later time. For example, you may want to set a spatial bookmark for the metropolitan area around St. Louis. You can then pan and zoom and still return back to the same area. This is an excellent way to make sure your layout always has the exact extent for each printing.
To set a spatial bookmark, first position your window you wish to save. Then select View > Bookmarks > Create. Be sure to give your bookmark a name that you will be able to remember later. To refer back to the same location again, select View > Bookmarks. A list of all the bookmarks you have created will be given, select the bookmark you wish to return to. The screen will be positioned to the same location as when it was created.