When you do a sketch, as long as it's a closed sketch you can fill it with a cross hatching in the sketch properties. But that's too easy ;D I need a rectangular area with a cross hatch but only three borders visible. If I select the fourth border and make it construction then the sketch is no more closed and I have no cross hatching. I tried changing the color and style of the fourth edge, but it is still visible and printed like a dashed line. Is there a way or a neat trick to have a sketched area without borders?