To navigate through your scene, use view navigation buttons located at the lower-right corner of the program window. All view types, except for Camera and Light views, use a standard set of view navigation buttons.
standard navigation controls
Clicking standard view navigation buttons produces one of two results:
Executes the command and returns to your previous action.
Activates a view navigation mode.
You can tell that you are in a mode because the button remains selected and is highlighted. This mode remains active until you right-click or choose another command.
While in a navigation mode, you can activate other viewports of the same type, without exiting the mode, by clicking in any viewport.
See Viewport Controls.
You use the Undo View Change and Redo View Change commands on the Views menu to reset standard view navigation commands without affecting other viewports or the geometry in your scene. These commands are also found in the menu displayed when you right-click a viewport label.
Views menu > Undo and Views menu > Redo are separate from Undo and Redo on the Edit menu or the Main toolbar. gmax maintains separate Undo/Redo buffers for scene editing and for each viewport.
The View Undo/Redo buffer stores your last 20 view navigation commands for each viewport. You can step back through the Undo View/Redo View buffer until you have undone all of the stored view-navigation commands.