thomas Riley, that should be part of your menu.

"Erasing Images

Erasing a single image / Erasing all images

1. Press the 7 button.The last image appears on the screen.

2. Select the image you want to erase with the < / > buttons.

3. Press the MENU button.

4. Select [Delete] with the up /down buttons, and press the SET button.

5. Select [Single] or [All] with the < / > buttons, and press the SET button.

[Single]: Erases the selected image or the last image.

[All]: Erases all of the images except for the protected images.

6. Select [Execute] with the < /> buttons, and press the SET button.

To not erase, select [Cancel], and press the SET button.

7. To exit from the menu, press the MENU button.

The manual is available right here

Hope this helps, good luck.