Feeling silly but halfway through the tutorial, where I’m asked to create a rectangle on the surface, I’m unable to select the edge of the rectangle and sketch as directed and choose the Tangent constraint. It just wants to create a new rectangle. If I do succeed in selecting both edges, the constraint
menu goes away! The visual in the video for selection is a little different from what I’m seeing (green dot in video, purple dot for me), so it feels like I may be in a different mode, but I’ve followed the video meticulously and can’t get past this step. Help!