I have a bug and a feature request 
- although maybe it is already a feature and I missed it.
Bug - with inspection mode, the way the object’s size is determined (and therefore it’s size on the screen when inspected) is dependent on the mesh rotation. So if you have a model that is proportioned 2:1 then rotating it will affect it’s vertical or horizontal boundary box (if looking in world space, I guess?). I haven’t tried putting the object within a blueprint, and seeing if rotating the blueprint would work, which as I’m typing this I realise would probably fix the problem.
Feature - Clamped rotation in inspect view. I.e. for a note or photo you might want to allow 360 rotation left and right, but only 20 up and down, so the player can’t get the note into weird angles.