I don't know if that came out right. My favorite non-Poser 3d app of choice allows a user to dynamically define any hotkey / mouse stoke combination to any function via a dedicated hotkey editor. While Poser has hotkeys and GUI navigation, I don't think they're user assignable.

There may be keystroke / gestures that will do what you want, though it appears that Poser's navigation is through the GUI rather than input devices. I hope someone can prove me wrong.