Sony DVS-7300 User Manual page 298

Overview
Paint mode
In this mode you can move the masked input video, leaving a trail, and
writing the result to memory. In this case, use the dedicated pattern for the
mask.
It is not possible to use this mode concurrently with the manual mode.
Move mode
In this mode, you can move the whole stored frame with respect to the video
space.
You can use this function on a still frame (STILL) created using either the
manual mode or paint mode, or on the (movie) input video (LIVE). When
you select the input video, it is also possible to apply a mask so as to move
only part of the input video image.
Link mode
In this mode, frame memory 2 is linked to frame memory 1, and the two
frame memories can be moved in the same way. It is also possible to link
mask patterns.
Lock function
To protect a frame written to memory, and prevent it from being overwritten,
it is possible to write-protect the frame memory. This is referred to as the
"lock function".
6-4
Chapter 6 Frame Memory
Input video
Stored frame
Stored frame
(still or movie)