Hi dupakos,
Unfortunately, as far as I know, there is no way to switch to the next Playlist record "in the background". And unfortunately, there is currently no function such as "Playlist +" for assigning to an Assignable button or to a Pedal.
The easiest would be to use the EXIT button to close the Text Viewer and thereby return to the Playlist display, or press the PLAYLIST button.
Best regards,
Chris