I have an old Logitech mouse without mozsewheel. + and - didn't wordk for me, not even as I assigned them in the controls (looking at the keyboard controls within the game, the controls say that there aren't any keys assigned to zooming, at least in my games).
You can configure zoom buttons? I looked through the whole control setting several times, but never saw anywhere to configure it. +/- don't work and I don't have a mousewheel <img src="/ubbthreads/images/graemlins/ouch.gif" alt="" />
