This feature allows you to override and change the capacity of specific events in an entry.
Changing the capacity for a single event:
Head over to your Scheduling page
Select the specific event/date on your schedule that you'd like to change the capacity of
Select the down arrow next to Edit entry, then Event specific information (if your event has a 'physical' location) or Add online joining details (if your event has an 'online' location):

Enter your maximum event size for this specific event:

For course-only events:
Head over to your Scheduling page
Select the course on your schedule that you'd like to change the capacity of, then the attendees icon 👨👩👦 to open the attendee register for that specific date/time:

Select Options, then Event specific information (if your event has a 'physical' location) OR Add online joining details (if your event has an 'online' location):

Enter your new maximum event size for this specific course date, then Save changes:

Please note - if you're reducing the capacity because you've taken bookings outside of Bookwhen, we'd recommend manually booking those attendees rather than adjusting the event capacity.