I guess what I want (Graphisoft) is the ability to alter edges of elements in elevation view, similar to how you do it for cut elements in the 3D profiler.
What would also be very useful is having two different settings for "uncut line pen". One setting for floorplan, and one for elevation would be great, as you often don't want them the same. Example: columns. When you cut through a column with a decorative base in plan, you want the many close together lines that you see below to be a very light linewieght. But, when you do this, the same setting applies for the elevation. You then have a very light column showing up in elevation, and it looks like junk.