I have a disign similar to a square. I want to align the seam at an exact specific point. I can set the seam to x 50, y55 and I can see the seam start and end on the corner. But I want to move the seam slightly to the other side of the corner so I try to set x 51. The seam now jumps about 5 cm the other direction. I can even make adjustments to .001 and it will still jump almost 5cm the other direction. What is the deal??? How can I get accurate full control of the alignment? Also is there a way to put a point on the surface to see the exact coordinates I want to pin point rather than trial an error every fraction of a millimeter?