Hello, if I understand correctly, you are saying create 2D drawing from the tools menu. At this stage, you will see options such as shred / shred scans, ladders, libraries. If you do not break up the scans, your column scans will not be transferred (exploded) as separate lines. Can you illustrate the excess line situation with a floor plan? In order to understand why you feel the need to fix the stairs in 2 dimensions, we can help more easily if you add a project, at least the single floor plan of the floor you have stated you have a problem with, to the forum. Good work