Preset Menu - Store and recall presets. There are several commands at the bottom of this popup menu:
open - All presets are separate files on your disk. The preset popup menu consists of those found in
/Applications/Audio Ease/Altiverb 5/Presets/
If you want to load a preset from another location, use this open command to navigate to it.

save - Replaces the contents of the currently selected preset by Altiverb's current settings.

save as - Saves Altiverb's current settings as a new preset in the Preset folder:
/Applications/Audio Ease/Altiverb 5/Presets/
It will therefore also be added to the preset popup menu.

delete - Deletes the currently selected preset form disk and from this menu.

rename - Renames the currently selected preset without changing the contents of it.

-Switch off help by clicking