Hi Berube, thanks for sending the video, that helps me understand.

That happens because MoI does different things in some cases when you do a press and release (click) versus when you do a press and drag.

When you initially click down, MoI will go into a kind of "wait and see" mode where if you release the button it will do a click action or if you move the mouse far enough with the button still down it will do a drag action.

But for the Orbit with Alt+Left drag, there isn't anything that happens with a click so it will go into directly into view manipulation without any "wait to see if it's a drag or click" happening.

You should get the same immediate behavior for Pan and Zoom if you use Alt+Shift+Left drag for pan and Alt+Ctrl+Left for zoom instead of using middle or right buttons there.

The behavior with Alt+Middle and Alt+Right has been like this since MoI v1, it isn't any recent change in v4.

But I think I should be able to set Alt+Middle and Alt+Right to behave like Alt+Left though since there isn't anything special happening for a click versus drag there so the "wait to see if it's a drag or up" step should be feasible to skip there as happens for Alt+left currentlly.

I'll see about setting that up for the first v5 beta.

- Michael