Beyond Custom Functions, Personal Functions enable you to further customize your camera settings.

They are set with the provided software (EOS Viewer Utility). Only P.Fn-00 (Custom Function group registration) can be set with the camera.

P.Fn. No.	Description
00	Custom Function group registration.
01	Disables the shooting modes.
02	Disables the metering modes.
03	Specifies the metering mode for manual exposure.
04	Sets the maximum and minimum shutter speeds to be used.
05	Sets the maximum and minimum apertures to be used.
06	Registers and switches the shooting mode and metering mode.
07	Repeats bracketing during continuous shooting.
08	Sets the number of shots to be bracketed.
09	Changes the bracketing sequence for C.Fn-09-2/3 to increased exposure, standard exposure, and decreased exposure.
10	Retains the shift amount for program shift.
14	Disables focus detection (search driving) by the lens drive.
15	Disables the AF-assist light.
16	Enables automatic shooting when focus is achieved at the fixed point of focus while the shutter button is pressed fully.
17	Disables automatic AF point selection.
18	Enables automatic AF point selection when C.Fn-11-2 has been set.
19	Sets the continuous shooting speed.
20	Limits the number of shots during continuous shooting.
21	Enables quiet operation when the shutter button is OFF after shooting.
23	Changes the operation timer?s time length.
24	Keeps the LCD panel illuminated during bulb exposures.
25	Sets the default settings when the CLEAR (+WB) button is ON.
26	Speeds up the shutter-release time lag.
27	Enables the electronic dial?s function to be used in the reverse direction.
28	Prevents exposure compensation from being set with the Quick Control Dial.
30	The <> switch also enables the <>.
31	Adds original image verification data.

* About P. Fn-11, 12, 13, 22 and 29

To preserve the same Personal Function numbers (P.Fn-00 to 31) used by previous EOS-1 cameras, a few Personal Function numbers have been left unused.