3.Press the Up/Down button to select “Lock”.
4.Press the Menu button to confirm and save your choice.
5.A lock icon 
will appear on the bottom right corner on the LCD.
Note: At step 3 you can select “Unlock” and press the Menu button to unlock the current file.
Delete
Delete unwanted photos and videos at any time in order to free up memory. You can delete one image or video clip at a time or delete all except the unprotected photos and videos that are currently recorded on the memory card.
1.Press the Menu button.
2.Press the Right/Left button to select the Delete menu.
2.Press the Up/Down button to select ‘This Image’ in order to delete the current photo/video that you selected only.
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