You can do this from the roster view.
- Go to the Upcoming tab in the Sawyer menu
- Click on the individual class to open up the roster view
- Click the three dots [...] to the right of the Message button, below the +New Order button
- Select "Cancel Session" from the dropdown
This feature is designed for providers who cancel just one class out of a series--if, for example, there is a snow day--without preventing customers from signing up for the series as a whole.
Canceling a class does not communicate to customers that it has been canceled and does not refund them. You can send a class-wide email using the Message button and issue refunds to each customer if you so choose.
To remove every class session for a scheduled activity and prevent customers from signing up, refer to this short Help Center about how to delete a scheduled activity.