PADS - CUSTOM MODE
Hold the PAD MODE mode button down and then press the 8th Pad twice (or once if already selected) to set the PADs to Custom mode Release both buttons.
The Custom page will be then selected and displayed on the Pads section of both VirtualDJ and Touch screen GUI
This mode offers the ability to easily customize the behavior of the Pads and assign VirtualDJ script actions via the Pad Editor.
Read further details in VirtualDJ Manual -
By default, the Pads have no functionality in this mode.