Canon EOS 20D Instruction Manual page 143

Custom Function Settings*
You can enable the built-in flash, external Speedlite, and non-Canon
flash connected to the PC terminal to fire.
0: Fires
1: Does not fire
The flash will not fire.
0: Off
1: On
For the ISO speed, "H" (equivalent to ISO 3200) will be selectable.
Youcan changethe AEBsequencewhenthe picturesare bracketedwiththe shutter
speedor apertureand thefile-savingsequencefor whitebalancebracketing(WB-BKT).
When "Autocancellation" is set, bracketing willbe canceledinthe followingcases:
AEB:You turn the <@> switch to
<OFF>,
change lenses, have flash-
ready, replace the battery, or replace the CF card.
WB-BKT: You turn the <@> switch to
<OFF>,
replace the battery, or
replace the CF card.
0: 0,-,+/Enable
1: 0, -, +/Disable
The first bracketed shot is the standard exposure (or exposed with the
standard white balance). This bracketing sequence can be repeated.
2: -,0,+/Enable
Starts the bracketing sequencewith the minus(bluish or magenta bias) setting.
3: -, 0, +/Disable
Repeats the bracketing sequence starting with the minus (or bluish
or magenta bias) setting. This bracketing sequence can be repeated.
0 : Standard exposure 0 : Standard white balance 0 : Standard white balance
- : Decreased exposure : More blue - : More magenta
+ : Increased exposure + : More amber + : More green
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