So I have two objects. One is a high poly (~4m polys) and the other is the LP of that same object. I'm going to freeze the HP and then refine the LP so it mimics the HP. However, I need hidden edge mode enabled to be able to see the edges on my LP, which then displays all of the edges on my HP and it's impossible to work…
I think this is what you are looking for: When this is enabled, then it will display the selected object with edged faces, regardless of the edged faces is enabled or not.