Up and down _usually_ mean treble or bass heavy. It sounds like you're also talking about front-to-back depth. For this you have three main things to play with:
- relative volume: louder is closer
- EQ: as things move further away, the tops and bottoms roll off
- ambience: ambience has two parts (a) size; and (b) distance; balancing these two will move things front to back. Eg, if the reverb is big, and loud compared to the source, the source will sound further away (and you can layer EQ on to this as well). Pre delay will also add distance between the source and the reverberation.
I was looking for numbers on EQ and distance, and found this article https://www.soundonsound.com/techniques/creating-sense-depth-your-mix