I am new to Librecad (and only a basic understanding of CAD in general) and I'm really enjoying it so far. I am fairly sure that it will serve my purposes. As i'm experimenting around, something came up that I was hoping someone could help me with. In my "current drawing preferences" I set the "main drawing unit" to millimeters. Then, I set the grid x and y spacing to 1 and 1. I was thinking that set my grid to be 1mm apart. I drew a rectangle, snap to grid, 1 x 4 grid spaces. But then when I took a measurement, snapping to the intersection, it measured 10x40. What gives? Am I doing something wrong? Thanks for any time you care to give my question.