Hello, I'm rather annoyed because when I want to draw a sheet metal part (body selected on a mechanically welded assembly), I have a most annoying problem:
When I unfold my part, highlighted lines appear above and outside the view (representing the other parts of my mechanical weld).
This becomes restrictive considering that I cannot select certain lines of my part to dimension it.
Have you tried on your view to switch to wireframe images (the 1st and not the hidden wireframe) maybe it can help you select the lines you are interested in.
Also see in your room how you manage the display states of your different configurations, for example use the keep body function instead of masking, which prevents it from keeping in memory a volume that is no longer visible.
Thinking about also linking the display states to the configurations can help. (I've had problems for a long time because of this checkbox )