I think we should put in a few more shortcut keys possible for more conveniency such as:
T = Toggles Tile Transparency
O = Toggles Tile Overlay
Numpad + or - = Change Tile Csets
Oh, another good idea about the Subscreen Editor
Transparency doesn't work (It crashes ZQuest if you try to put in a tile that uses it. :O ), but these could be useful. HOWEVER! Give some examples how these could be helpful. 😉 (In case you didn't know, I'm kidding. You don't have to give any examples.)