Pioneer Dj DDJ-FLX10 4-Channel DJ Controller for rekordbox and Serato DJ Pro (Black) - Manual (Page 120)

Serato DJ Pro
120
En
Loading an audio track onto a deck
The following explains how to load a track onto deck 1 as an example:
1 Press the [BACK] button on the unit to move the cursor to the
crates panel of the Serato DJ Pro software screen, then turn the
rotary selector to select a crate, etc.
2 Press the rotary selector to move the cursor to the library of the
Serato DJ Pro software screen, then turn the rotary selector to
select the track you want to load.
A Library
B Crates panel
3 Press the rotary selector.
The track loads onto deck 1.