Rotating in PreForm

Am I missing something about how to rotate the model and the entire grid within PreForm?  It appears that you do this by holding the right mouse button but there isn’t a clear way to determine which axis it rotates on.  Often I want to rotate it one way, but it seems to do what it wants.  Is there a way to be more precise about rotation?  I might be missing something simple but I’ve looked and can’t find the answer.

The rotate button should give you access to the controls your looking for. By plugging in different values for x, y, and z, you’ll be able to flip your part precisely around an axis. We’re looking at providing more hands-on manipulators and such in future versions, but I don’t have a timeline at the moment.