“Save classes” button

Step by step

1. Open the event’s admin desk.
2. Scroll to “Classes for this event.”
3. Check or uncheck classes from your club’s master list to control which ones this specific event offers.
4. Click Save classes below the checklist.

This only affects this one event — your club-wide master class list (managed under Events → Competition classes) is untouched. If someone’s already registered in a class you just unchecked, their registration stays exactly as it is; new registrants simply won’t be able to pick that class going forward.