You can also set up hotstrings, so that pressing say "ctrl+F1" (KC's usual example here ) it "links" via a command to button 1 (or whatever you bind it to)

So you press ctrl+F1 on PC/account1 which tells that copy of KC to send the command "mage.ranged.1" PC/account2 receives that command and translates it to "press 1 dumbass" which happens to have Fireball on it