Better Object Pickup/ Smaller hitboxes/ Locking Objects

It would be awesome, if we could lock objects from interaction or make it easier, to select an object in between other placed assets. As soon, as you placea smaller object close to a bigger one, the hitboxes overlap and the bigger one is always in the way. Some sort of control setting, like pressing Alt while hovering over the objects, the cursor either ignores the hitboxes or a small taskbar opens with all nearby objects in a certain radius, where you can scroll through via mouse wheel and select the object, you want to edit. Something like that or a simple lock object fetaure. Please.