Roland V-1600HD Owner's Manual page 36

Compositing the Pictures
4.
Output the composited results.
Press the DSK button. The logo or text input on the DSK channel is composited onto the background and output from the V-
1600HD.
fig.DSK-button.eps
5.
Switch the background picture.
Using DSK, you can transition to different background video source while your DSK material remains overlayed. At the PST/
EFFECT section, use the INPUT selectors and the [TAKE] button to change the background picture.
fig.switch-background.eps
36