It'd be really awesome if you guys could make it optional to set the hand tool to be used by holding down the middle mouse button and ONLY the middle mouse button. I reckon it would be a lot more comfortable to have that functionality as a one-hand job rather than a two-hand job.
I agree. Wondered myself why the middle button is unused.
And zoom in/out with the mouse wheel or chane the brush size with it. Current scrolling with it doesn't make sense anyway.
zoom in/out with the mouse wheel
Already available in preferences.
generally it's a usability sin not to use the MMB click at all.
But i would really prefer other things than the hand tool ... the current navigation with the space bar would be very consitent if SPACE + LMB / RMB would zoom in an out, and maybe a simple SPACE hit zooms to 100 % ... as i wrote in an other thread already.
MMB should be used for example for custom tools menu, a popup for the last used functions, or - and this is what i would prefer - go into transform mode.