Update a Single Event:
From the Booking Summary, click the event you want to update
Select the Status from the dropdown
Click Save
Batch Update Multiple Events:
Use the checkboxes to select the events you want to update
Click Batch Actions → Update → Status
Select the new status and click Apply
Additional Information:
If you need to change the status of the entire Booking, update the Booking Status. This will prompt you to update all associated events at once.