I recently updated my solidworks from 2018 to 2020. In the process, solidworks changed some configuratios back to "default". Now, when I want to mate 2 parts, the first part I click does not become transparent anymore, instead it just changes into a whiter shade, but doesnt let me click through the part like before. Now, I have a completely closed part and need to see inside it as I build my assembly, so I tried changing the trancparency to 20% but the same thing happened. I already put another part inside it using section view, but after removing the section view I cant see the part inside at all.

Please help, i tried changing "assembly transparency for in context edit" in System options - Display, but nothing changed