Canon EOS Rebel XTi Instruction Manual page 75

Setting Exposure Compensation
*
Set flash exposure compensation if the flash exposure of the main
subject does not come out as desired. This feature a.lso works with
external EX-series Speed lites.
1
Select [Flash exp comp].
~
Under the
[02]
tab, select [Flash
exp comp], then press <8>.
Set the flash exposure
compensation amount.
~
To make the flash exposure brighter,
press the
<
~
> key. Or to make it
darker, press the
< ..... >
key.
~
After setting the flash exposure
compensation amount, press
<
8
>.
~
When you press the shutter button
halfway, the <
~
> icon and flash
exposure compensation amount will be
displayed on the LCD monitor and the
<~>
icon will appear in the viewfinder.
~ After taking the picture, do step 2 to
reset the flash exposure
compensation amount to zero.
A bright flash exposure Flash exposure compensation
making it darker
75