Scale Controls
The scale controls allow you to control the horizontal (Signal Width) and vertical (Signal Depth) expansion of the sound source.

The scale controls influence the perception of spatiality and ambience, as well as the traceability of signals.
100 % corresponds to the complete width or depth of the surround field.
If you reduce both values to 0 %, the distance is reduced to zero and all source channels are centered in one spot.
Note
Signal Depth is only available for configurations with front and rear channels.