Originally posted by d24e I have the dual optical from Logitech (4 buttons seems more than enough to me) Maya doesn't recognize the thumb button. Maybe there is a way that I haven't found out though. I (think I) have the same mouse. All I had to do was to intall logitech's own mouseware drivers and with those I can configure the thumb button to be whatever I like. Currently I have it as an Enter key...