What commands correspond to a "middle click"?

[Argelius]

I have a Logitech Marble Mouse that allows you to program a number of accessory buttons to do different things.

I'd like to program a "middle click", but need to know Mac's key combo for that.

Does anyone know it?

Thanks!

 

[ChrisBrightwell]

OS X treats the middle click as an extra mouse button. Check your Mouse settings in System Prefs.