> About rotate using middle mouse button : I feel rotate using MMB is more
> heavy than using RMB, please try it. Just my feeling or ...?

Hi Lish, do you mean it doesn't feel like it works in the same way as the right button?

As near as I know it should function the exact same way once you click down.

But it isn't unusual for it to take more effort to push down the middle button on your mouse than the right button though, I think many mice are set up that way to make it less likely to accidentally click the middle button when using the scroll wheel. That's one of the reasons why I put the rotate on the right-click by default instead of the middle.

- Michael