Look for a file acad.pgp (my home machine has it as aclt.pgp). This is a text file and part of it has the 'hotkey' assignments. I've revised a few of them such that 'o' opens a file rather than osnap function. I'm kinda lazy and like to use my keyboard as much as I can.
By using hotkeys, you can get rid of some of the menu stuff and free up some screen real estate.