By Alexander.Carrelo 2014-01-17 21:15:12
I wouldn't recommend using the mouse for swapping between screens (or really for anything in FFXI). If you click while moving the mouse over one of the screens, there's a high chance that the character will take off running in some random direction until you click and drag it in the opposite direction. Clicking on the screen can also do the same thing as hitting the enter key on whatever the character was targeting or looking at in the menu when you last switched away.
I've always just alt+tabbed between screens so I'm not 100% sure, but I think there might be an option to disable mouse input in one of the config menus, which should fix the above problems if you're too accustomed to using the mouse. Worth looking into if you haven't already. There's also something called Switchmon that's supposed to let you set a button on a USB controller to swap between screens, but I don't know much about it either. :<