Sketchup is designed for use with a third mouse button (particularly the pan and orbit functions). Can I emulate the third button for SketchUp using a MacBook's trackpad or user gestures?
I just discovered that as long as you keep finger contact on the trackpad, you can release the keys and still continue to Pan or Orbit.
If you release your touch on the pad, as happens if you cannot go any further in the limited space, then you have to use the keys again to get into the desired command, at which point you can release the keys and keep Panning and Orbiting.
Thanks for the question. Your post did the same thing thing for me that you wanted: it showed up first in Google search to remind me of the correct keyboard commands. My normal workstation has a 3-button mouse just for SU, but sometimes I'm on a laptop with no mouse, or only a magic mouse.