Hi Will, also if you're using a trackpad there are some alternate navigation methods using key combinations which probably will work better for you rather than doing either a right-click or scroll wheel type zoom using the trackpad.

Those are:

Cmd + left drag as an equivalent for right-button drag. This will pan the ortho views or rotate the 3D view.

Cmd + shift + left drag will pan both the 3D view and the ortho view.

Cmd + Ctrl + left drag up or down will do a zoom in/out.


Those may work better for you than trying to do the regular method of right-drag or scroll wheel zoom which are more oriented towards using a mouse with a scroll wheel.

There was a previous reply where those were mentioned, maybe you missed it:
http://moi3d.com/forum/index.php?webtag=MOI&msg=5213.2

- Michael