Sony DVS-9000 User Manual page 309

Buttons for registers in which wipe snapshots are already saved light orange.
Canceling recall of a wipe snapshot
To cancel the operation of recalling a wipe snapshot, press the [UNDO] button.
Deleting the date of a saved wipe snapshot
Holding down the [DEL] button, press the button for the register in which the
wipe snapshot you want to delete is saved.
The register button you pressed goes off.
Wipe Pattern Operations in the Multifunction Flexi Pad Control Block
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