Canon EOS Rebel T1i Instruction Manual page 189

C.Fn-12
0: Display
When the power switch is turned on, the shooting settings will be
displayed (p.42).
1: Retain power OFF status
If you pressed the <B> button and turned off the camera while the
LCD monitor was off, the shooting settings will not be displayed when
you turn on the camera again. This helps to save battery power. The
menu screens and image playback will still be displayed when used.
If you pressed the <B> button and turned off the camera while the
LCD monitor was on, the shooting settings will be displayed when you
turn on the camera again.
C.Fn-13
0: Off
1: On
Data for verifying whether the image is original or not is appended to the
image automatically. When the shooting information of an image
appended with the verification data is displayed (p.161), the <L> icon
will appear.
To verify whether the image is original, the Original Data Security Kit
OSK-E3 (sold separately) is required.
The images are not compatible with the image encryption/decryption
features of Original Data Security Kit OSK-E3.
LCD display when power ON
Add original decision data
3 Custom Function SettingsN
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