You can create mixer presets for Acoustic Agent. These presets contain all Agent mixer, AUX mixer, and Kit mixer settings for the loaded kit.
Mixer presets can only be applied to the kit they were saved for, because the number of used instruments and mixer channels varies between the kits. Each kit comes with its own set of presets.
The controls for loading, saving, and deleting mixer presets can be found to the left of the ROOM/OH tab.