Conflicting Planes

I feel sort of dumb because I can’t think of the name of it (Zorder?). You know when 2 planes are fighting for display because they are right on top of each other?

Is there a way to tell Blender which one should be on top?

Just move the plane you want on top just a little so it doesn’t conflict with the other.

There are a couple settings that might help you out. There is a zoffset, and ztrans. I have to keep messing around to even find the zoffset so I can’t help much with it. Where I have needed it is with the shadow setting. If I don’t set the offset, the two fight with each other.