Go to the MS-DOS prompt, then enter the directory where you installed Ultima VII. Launch the game by entering the command "serpent manimal spam s". This allows you to begin the game with the "Silver Seed". Once you are actually playing the game, press the F2 key to get to the debug menu. There you can create items, change your stats, and more. Generally the cheat funtions are mapped to F-keys and Alt-# keys. Here are some examples:
Press F3 to get to your TELEPORT map. Once in the map, click where you want to go.
Press F4 to use the VIBRATE SPELL.
Press F4 and try clicking on people, locked chests and more!