At some point in time I could Pan by pressing the Middle Mouse Button and Rotate with the RMB. But now that functionality is somehow lost, and I don’t seem to be able to configure it thattaway using the Tools - Mouse settings. Rhino 5.
What am I missing?
// Rolf
For the MMB:
For the RMB/Rotate, I thought that was pretty much hard coded. In parallel views the default is to pan with the RMB, this can be changed in Options>Views…
If you are unable to set these things, then something went wrong with your install…
–Mitch
Ouch, I should have been more specific. I meant Pan & Rotate in Perspective view with Mouse only (no combination with keyboard’s Alt or Ctrl).
I could navigate so nicely with only the mouse, including zoom by rolling the mouse wheel.
// Rolf
The setting in the first screenshot above should do that - it works here… --Mitch
Ah, unchecking the “Click and drag” option fixed it. When did I tick that check box…? 
Anyway, thanks. Now I got my life back again.-
// Rolf