Canon PowerShot SX70 HS Digital Camera - Manual (Page 136)

Protecting Images
Important images can be selected and protected to prevent accidental
erasure from the camera.
Protected images are labeled with a icon.
1
Choose an image.
2
button → [ ] → [Enable]
z Protecting Multiple Images
You can choose multiple images to protect at once.
1
[Protect images]
2
Choose images.
136