If you're already in home , home screen move to next category. Choose Help from PowerJOG menu to show PowerJOG help. Press and release Jog Dial to go back to the previous screen. PowerJOG have features that you can user without activating PowerJOG menu. Now you can move item by rotating Jog Dial and choose category by pressing and releasing Jog Dial.
Some window shows buttons with double frame shown below.
You can scroll scren but can't choose item like in built in applications. When screen don't scroll by Jog Dial, activate PowerJOG menu and choose PowerUp, then screen will scroll. When you're using MS Autorun , there's a chance that PowerJOG won't start. Remove Memory Stick and start PowerJOG again. Please refer to the manual of application.