This is something I’ve been puttering on lately; with some work it could be handy for layout.
Project: LINKAGE_TESTING3.zip (183.3 KB)
You can drag the white rect around, stretch it by dragging the little gray attachments, adjust its corners with the green ones, or rotate it with the blue circle. Calling up an image file dialog isn’t implemented, but wouldn’t be too much trouble. You can also edit those same properties through various controls in the scroll view on the right. (A few things there don’t have any visual impact but get emitted into the object data. Just experiments, mostly.)
With “Launch” you can start a “game” although that’s pretty uneventful right now. 
As the project name suggests, this is primarily a test of some Unreal-style linking features, so at the moment I’ve only bothered setting up the one object. I’m planning to record a little overview in the near future, once I hammer out a few key linkable behaviors.