Engine.addModuleStateToUserPreset("name here");

[Lindon]

So do I only need to issue this commend once in my app, or each time the user wants to save a preset?

[d.healey]

@Lindon Just once, in on init.

[d.healey]

If you have several modules to do you can use a loop:

// Save EQs with presets
const eqIds = Synth.getIdList("Parametriq EQ");

for (id in eqIds)
    Engine.addModuleStateToUserPreset(id);

[Lindon]

@d-healey thanks.