Exiting Loop mode in a certain way leaves the arpeggiator enabled, but the arpeggiator indicator light will be off.
1. Press Arp/Loop button to enable Arpeggiator
2. Press Record to enter Step Record/Loop Mode
3. Press Arp/Loop button to exit Loop Mode
4. Press Record to exit Step Record Mode
5. Arpeggiator is now enabled, but the indicator is off
6. Press Arp/Loop button. Indicator light turns on and arpeggiator remains enabled.