view rotation

I'm new to Onshape. Running Chrome on Windows 10. In preferences, I've selected "Onshape (default)" for "mouse controls". ALT + RMB drag does not result in constrained rotation. Holding the ALT key down doesn't seem to change the behavior at all. Rotation/orbit occurs about all axes. I've tried both ALT keys. Same problem…

I exited OnShape and when I returned the center of rotation on right-drag is far from the origin. It causes the model to swing in a big circle and go out of view when rotated - very inconvenient. I tried exiting and returning again but the problem remains. I've never seen this happen before. What could be the problem?

I've been using Onshape for quite some time where the default behavior has been to rotate about the mouse point when I right-click to rotate. As of today, I'm noticing that no matter what, my right-clicks are rotating about the origin or some other point in space not on the model. How can I revert this behavior? Any help…

Good afternoon, I'd like to make a video of my part files rotating about an axis. How would I do that?