Placing Items On Top Of Another

I'm just getting back into base editing, and I seem to recall a few issues back an improvement was made to the Base Editor that allowed (at least I think it did) one to stack items on top of others, or at least make it easier to float objects. I could be mistaken, as I never used this new improvement. I looked around on the main website but the info there on Bases reads nothing about this feature, and I did not spot it here in the forums. Can anyone tell me how to access this feature so I can stack and possibly float base items?

Found what I was looking for. Hold down the Shift Key will moving the object up or down.

Yeah that's it. Also holding ALT allows you to rotate items and holding CTRL will let you move an object will keeping it at the same height.