Sony DVS-9000 System User Manual page 773

To execute an action when the [REWIND] button is pressed, it is necessary to
set this action (Rewind Action). To carry out this setting, in the Macro
>Timeline >Timeline menu, press [Rewind Action] to recall the Rewind
Action menu. In this setting screen, use the same setting method as in the
screen for setting an action on the macro timeline.
Alternatively, you can select the reverse arrangement, whereby when the
[REWIND] button is pressed, this executes the action set for the first keyframe,
and when the [RUN] button is pressed the first keyframe action is not executed.
In this case, the Rewind Action setting is still valid.
For details of the setting, see "Setting the First Keyframe When a Rewind is
Executed" in Chapter 19 (Volume 3).
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Macro Timeline