How to Delete Future Classes?

Quick Functions -> Sched Matrix OR Functions -> Schedule -> Sched Matrix
Once in this screen, choose Quick Menu -> Future Appt

Above where you would enter a member name the following will appear:

View Members in Class OR View Classes (including NOT_AVAILS)
 
Choose View Classes
This will give you the listing of all classes and you can delete all future classes from here.

You can also do a Custom Query if you need to delete classes

• after a  Scheduled Date
• by Trainer/Instructor
• Class Type