Canon IXUS 70, PowerShot SD1000 Basic User Guide
In the playback mode, use the or button to select
an image to erase (a) and press the button (b).
Confirm that [Erase] is selected and
press the FUNC./SET button (c).
To exit instead of erasing, select [Cancel].
Please note that erased images cannot be recovered.
Exercise adequate caution before erasing an image.
See the Advanced Guide: Erasing Images (p. 101).