Catapult should be able to target air with artillery.

[Saiyuki]

there are some ways of implementing a switch, but surely nobody would want it to be a message typed in the chat. as for other dummy skills, we have not enough space on the units to set an additional one. did you want it to be simply pressing esc? neither of those would have found their way into the map, because it would still needs some time to change it.

i'm not trying to piss you off, i just want you to complete your thoughts before posting an idea, which leads to a prorblem that you could have easily figured out yourself.