Hi there!
It seems sprites/icons of various actors placed in the level can be partially or fully hidden by geometry. For example the following screenshot shows a simple Blueprint with a cube mesh. Since the root of the object is at ground level, the sprite/icon is partially obscured by the cube mesh. I would expect that those sprites/icons render on top of everything, making them easily identifiable and clickable while editing the level? Do I always have to be on the lookout because I may be missing some vital actor hidden under the floor, in the walls, etc.?
Being new to Unreal and coming from the Unity world, possibly I’m looking for this setting seen below. It allows to switch between 2D icons (always the same size) and 3D icons (scale with distance) as well as a very useful scale slider. You also see the T-icon (of a TextMesh), which is on the surface of the door and therefore partially rendered inside it, but still clearly visible. Also some other icons in the background behind that door.