You can control which trial dates appear on your website directly in the course settings.
Go to:
Course > Settings > Trial > Sessions Shown in Form
Here you can decide whether to:
Show a fixed number of future sessions, or
Show sessions within a specific date range (for example, always the next three weeks).
If you just need to move one session, open the registration → Attendance → click Book a session, then select the new date and class.
If you’re moving the entire trial registration to a different class:
Open the registration detail.
Go to the Class section and click Transfer.
Select the new class (you can filter by course or location).
Click Transfer to another class → Continue.
The registration status will remain Trial started.
Choose the next session date.
Keep the payment unchanged if it’s already paid — tick Do not change payments.
Decide whether to notify the client about the change (checkbox).
Confirm by clicking Continue.
Go to Attendance to hide or add sessions as needed.
You can manage attendance flexibly:
Click Hide to remove a session. This hides it from reports and from the client’s view. The client won’t get notifications for it.
Click Book a session to add a new one.
You’ll find both options in the Attendance section of the registration.
Go to the registration → Attendance.
Click Hide to remove the original date.
Click Book a session to add the new date.
The client and instructor will both receive a notification and see the updated session in their profile.
If you want a trial participant to keep their seat reserved in the class until they either enrol or are marked as lost, go to:
Course > Settings > Trial > Reserve seat for trial attendee
and check the box.
To set a longer or paid trial, open:
Course > Settings > Trial
Under Trial type, choose between:
Free trial (single or multiple sessions), or
Paid trial (single or multiple sessions).
You can also adjust the unit price per session here.
If you want clients to book only trials (and not full enrolments), open:
Course > Settings > Online Registration (Edit)
Under Registration Options Shown on Website, select:
Trials only
(or any other option that fits your setup).

Most trial settings are controlled at the course level — so each course can have its own unique setup, payment type, and visibility rules.