need help setting up 2 computer screens for game read for more info

[Shadoweffect]

basically its like this. I got one monitor thats 15 inch andother that is 17 inch.

I play a game called world of warcraft. I got 2 accounts and 2 computers. Im using 2 logitech lx300 wireless keyboard and mouse to control bothe characters at one time. heres my problem.

Basically since the monitors are different sizes my game icons ect are different sizes which in turn leads to me pressing the wrong hotkey on the 17 inch monitor since the hotkeys are bigger basically my mouse doesnt line up with the one on my 15 inch because of this. my question is how do i make it to where both the game screens are the same size? so If i press a hotkey on my action bar in game on one account it will do it at the same time on my 2nd?

[Shadoweffect]

actually figured out my real problem so gonna make another post this one can be deleted