Simply press the ‘P’ button at any time to change programs before any toning session. You cannot change a program during a session. You must first switch your controller off and then on again. Then you can select a different program by pressing the program button.
Please note that you can change programs at any time, but you will be starting all over again. You do not lose your overall sessions history, but you will have to start from program 1 again if you wish to restart.