Sony DVS-9000 User Manual page 244

The button you pressed lights yellow, and this recalls the snapshot.
The numeric display shows the selected register number after the bank
number.
To cancel a snapshot recall operation
After recalling a snapshot, to cancel the recall, press the [UNDO] button.
Deleting a snapshot
As an example, to delete a snapshot on the M/E-1 bank, use the following
procedure.
1
In the M/E-1 bank Flexi Pad control block, press the [SNAPSHOT] button.
This allocates the Flexi Pad control block to snapshot operations. The
numeric display shows the last selected bank number and the last recalled
register number on the corresponding bank.
2
Select the bank for the register containing the snapshot you want to delete.
See step 3 (page 240) in "Saving a snapshot."
3
Hold down the [STORE STATS] button, then hold down the button in the
memory recall section displaying the number of the corresponding
register.
The button you pressed goes off, and this deletes the snapshot. The
[STORE STATS] button lights amber.
Note
On a simple type Flexi Pad control block, it is not possible to delete a snapshot.
Snapshot Operations in the Flexi Pad Control Block
243