Hello everyone,

I'm trying to understand how to use design review
I want to remove the color from the cross-section in order to see through it (grey area in the screenshot below). 

My goal is to be able to see through my concrete while still having the concrete's outlines visible. 

If anyone is able to help me, I would appreciate it. 

I tried going to the properties, but without success.
I also tried changing these preferences, but it doesn't seem to make much of a difference.