Canon EOS R50 Instruction Manual page 536

2.
Select [Select images].
3.
Select the image to protect.
Use the <
4.
Protect the image.
Press the <
be labeled with a [
To cancel protection and clear the [
again.
To protect another image, repeat steps 3 and 4.
Note
During playback, you can press the <
Quick Control screen.
>< > keys to select an image to protect.
> button to protect the selected image, after which it will
] icon (1) at the top of the screen.
> button and protect images from the
493
] icon, press the < > button