Sony DCR-SR220 - Manual (Page 40)

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To delete all the still images recorded on the
same day at one time
This function is available only when the
internal hard disk is selected as the media.
 Touch [ DELETE by date] in step 3.
 Touch / to select the recording date of
the desired still images, then touch .
The still images recorded on the selected date
are displayed on the screen.
Touch the still image on the LCD screen to
confirm. Touch to return to the previous
screen.
 Touch  [YES]  .