I have just found that Ctrl+Command+click works for zooming in and out, even though Command+click doesn't work as advertised for much of anything else. I find the combined Mac/Win keyboard controls very confusing - esp. in cases where Ctrl-something is specified, when E-on has used Ctrl-click to be equivalent to the RMB. Through experimentation, I may write up a Mac-specific Quick reference for the keys that work. If I go through all that, I'll be sure to post it up here as a PDF. - n8