Sony DVS-9000 User Manual page 54

5
To cancel a snapshot recall operation
After saving a snapshot, to cancel the recall, press the [UNDO] button.
54
Snapshot Operations From the Numeric Keypad Control Block
Press the [ENTER] button.
This recalls the specified snapshot, and the reference region name and
recalled register number appear in the display.
If you applied the effect dissolve or auto transition temporary attributes in
step 4, the corresponding buttons go off.