Deleting Unwanted Pictures - Nikon Z 8 Reference Manual

Deleting Unwanted Pictures

Press the O (Q) button to delete the current picture. Note that
pictures cannot be recovered once deleted.
Display a picture you want to delete and press the O (Q) button
to display a confirmation dialog. Press the O (Q) button again to
delete the picture and return to playback.
To exit without deleting the picture, press K.
Tip: The Playback Menu "Delete" Item
Use [Delete] in the playback menu to:
delete multiple pictures,
delete all pictures currently rated d (candidate for deletion),
delete all pictures taken on selected dates, or
delete all pictures in selected folders.
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