Hey,
I currently try to implement kind of a overlay / info screen for a lot of objects in my 3D room, but i don't have a clue how to do this properly. But: a picture paints a thousand words, so here's an illustration:

As you can see on that picture, I've got two UIs. One is for the other menu and is orthographic, the other one is perspective (used to run around in 3d space).
What i need is marked in green.
Hope you guys got some suggestions for me how to do that.
Regards