When one of our users creates a sketch off the front or right datum planes, the X, Y & Z directions go wonky. It doesn't matter which side of the datum plane he chooses. The top view is fine, but if he selects the front datum to place a sketch, the Z points down instead of up. I looked at the options, but I didn't see anything amiss. Is there something that slipped by me? Using Solidworks 2015 & Windows 10.