Which mouse button is which ?!

Hi all,

I am trying to customize my mouse. I have seen the CUI panel that maps certain commands to button 2, button 3, etc. However, How do I know which physical button corresponds to button 2, button 3... ? (I imagine that button 1 is the left-click, not remappable, but I may be wrong here).

If it is useful, I have a microsoft comfort optical 3000 with right,left,left-side buttons + a scroll wheel.

Thanks !

My guess would be it's 1-2-3 on top of the mouse, with the 2'nd being the scroll-wheel if there is one, and 4 and 5 continuing on the side. But the best way is just to try it out. Assign commands to each button, save the CUI and then click them and see what happens.