Question about bb.moveobject.

Lilsimsie recently made a short video about this topic: https://www.youtube.com/shorts/h0m2wh_kwss

Like Suzapalooza said, you place the clutter objects you want on the surface and move it away from the tile that is wanted. Then you should be able to drag the object of the surface and it should stay at the same height you can move it freely or raise it up or down. BB.MOVEOBJECTS AND SIMS 3 CAMERA MUST BE ENABLED

Another way to do this is to fill all the slots and then drag the wanted items to wanted area. I personally find the first way easier.

What I do is I place the object on the desk then move the desk forward a tile or two. Then move the clutter item back to where you want it in the original desk’s position holding alt key. Once it’s placed where you like it move the desk back to it’s original position as well and it looks like there’s clutter on the desk without it, taking up one of the slots for the desk

I'm a vanilla player on my PC & have used the much necessary BB.MOVEOBJECTS for over 10 years now with my Sims 4.            So, to move objects up you need to press the 9 key with shift key, to move objects down press the 0 key with shift key.          Now, if you want to make things bigger or smaller press the Bracket key with the shift key, the left Bracket key is bigger the right Bracket key is smaller.

Items tend to 'snap' to certain surfaces, even with MOO on. You could always use the 9 key to raise an item to the appropriate height, hold down the Alt key to get it to the horizontal position you want and then add the counter/desk afterwards. 

You can see I have raised the cup to the height of a counter (using MOO and 9), I can use Alt to move it around and then add another counter underneath it:

Here, I have used MOO and 9 to raise 3 random items to the height of the nearby counter, held the Alt key to move them to approx where I thought I wanted them (it's a little hit-and-miss) and then added a counter underneath.