Vivitar DVR-518 User Manual page 49

If you selected Lock All and press the OK button a "Protect All?"
8.
confirmation message will appear with "Yes" and "No" options.
9. Press the Up/Down button to select Yes to lock or No to exit.
10. Press the OK button to confirm, save and protect all the images.
11. If you selected Unlock All and press the OK button an "Unprotect All?"
confirmation message will appear with "Yes" and "No" options.
12. Press the Up/Down button to select Yes to unlock or No to exit.
13. Press the OK button to confirm, save and unprotect all the previously
protected images.
Note:
After selecting your lock preference, the corresponding lock
appear on the left hand side of the LCD for the image(s) selected.
Delete
You can delete unwanted photos, videos and audio files at any time
to free up memory. You can delete one at a time or delete all the
unprotected files that are currently recorded on the memory card at
once.
1. Press the MENU button.
2. Press the Up/Down button to select the Delete menu.
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