I was doing some thinking and I thought that it would be a simple yet useful idea to highlight 2D parts in 3D. Here is how I think it should work. You know how if you double click something in 3D and it jumps to that layer in 2D? Well, maybe we could have it where if you double click a painted seg, (seed or trace) then in 3D it highlights it a different color, so that it is easier to see, so that you don't have to delete it in 2D, look around in 3D to see if you could see what part it was, then you can't find it again in 2D, then you just get mixed up...
I know it would be a really small change, but it would be really useful, ESPECIALLY when you are inspecting a cube. Because if not then you would have the same problem as before where you try to find a piece on 3D, so you delete it on 2D and retrace it, but you accidentally lose it on 2D, then you just mess up what was there before.
I am not sure if this is just me being naive or not very attentive (I am speaking from experience, lol) but like I said: it would be a small change but it would help me out a lot, and I suspect a handful of others too. I know I could always use explore mode, but I usually don't switch to it every time before looking for a segment. That would just be ridiculous!