Pioneer Dj DDJ-FLX4 Portable 2-Channel rekordbox DJ and Serato Controller (Graphite) - Manual (Page 147)

Changing the settings
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• Pad 2 is lit: Demo mode starts when you don’t use the unit for 1
minute.
• Pad 3 is lit: Demo mode starts when you don’t use the unit for 5
minutes.
• Pad 4 is lit: Demo mode starts when you don’t use the unit for 10
minutes. (Default)