Many maps and drawings also have links to other information. The toolbar toward the top of the screen is useful also. Arrow buttons move to previous or next places. Scroll bars work well, too. The keyboard arrow keys and PageUp and PageDown keys also work.
Some links open additional files.
You can use the Window pull-down menu to change to different files that are already open. Use the magnifier buttons on the tool bar to zoom in or out. Page buttons zoom in or out quickly. Use the hand button as another way to scroll. Use the mouse to click on bookmarks to quickly move to other places.