Pioneer Dj DDJ-FLX4 Portable 2-Channel rekordbox DJ and Serato Controller (Graphite) - Manual (Page 20)

Part names and functions
20
En
Turn the outer section:
Bends the pitch (Pitch Bend – slows down or speeds up the track).
[SHIFT] + turn the top:
Fast-forward or fast-reverse the track with extra speed.
 Using Serato DJ Lite
1 IN button
Press:
Sets the loop in point.
Press (during loop playback):
Adjusts the loop in point using the jog wheel.
2 OUT button
Press:
Sets the loop out point, and loop playback begins.
Press (during loop playback):
Adjusts loop out point using the jog wheel.
[SHIFT] + press:
Turns Vinyl mode on/off.
3 4 BEAT/EXIT button
Press:
Starts Auto Beat Loop of 4 beats.
Press (during loop playback):
Cancels loop playback.
[SHIFT] + press:
Switches the active/non-active status of the loop.
iOS/Android