Pioneer Dj DDJ-FLX4 Portable 2-Channel rekordbox DJ and Serato Controller (Graphite) - Manual (Page 30)

Part names and functions
30
En
11 HEADPHONES MIX knob
Adjusts the monitor volume balance between sounds from the channels which
have the headphones
[CUE] button pressed, and the master channel.
12 HEADPHONES LEVEL knob
Adjusts the level of the headphones sound.
13 SMART FADER button
Press:
Turns Smart Fader mode (Preset 1) on/off.
[SHIFT] + press:
Turns Smart Fader mode (Preset 2) on/off.
14 Channel faders
Slide:
Adjust the volume of the sound for each channel.
[SHIFT] + slide:
Triggers Fader Start.
15 Crossfader
Slide:
Adjusts the sound balance between the left and right channels depending on
the crossfader curve setting.
[SHIFT] + slide:
Triggers Fader Start.