As we're now able to do a lot more with the build menu enabled it is very easy to to accidental move the symmetry plane by clicking on a block. I suggest adding an additional checkbox for setting the plane as it's not something that's being done constantly. ON checkbox - is just enabling/disabling the plane as it's working now SET checkbox - [x] : set the plane state; [ ] : clicks no longer can set the plane Code: Symmetry Plane : [x] ON [x] SET Opacity (o)25% ( )50% ( )75% ( )100% <--- how did this slip in here? ;) And again, BIG thanks for the rotate/toggle via mouse, it's just such a pleasure compared to using the keyboard. Edit : And in the off chance that you do multiple symmetries it would be great if their values were stored separately for the session.