Canon Rebel T2i EOS 550D Instruction Manual page 88

Setting Exposure CompensationN
y Flash Exposure CompensationN
Set flash exposure compensation if the flash exposure of the subject
does not come out as desired. You can set the flash exposure
compensation up to ±2 stops in 1/3-stop increments.
When you press the shutter button halfway, the <y> will appear in
the viewfinder.
After taking the picture, do steps 1 to 3 to return the flash
exposure compensation amount to zero.
If the [2 Auto Lighting Optimizer] (p.103) is set to anything other than
[Disable], the image may look bright even if a decreased exposure
compensation or flash exposure compensation has been set.
You can also set and cancel the flash exposure compensation with the
[1 Flash control] menu's [Built-in flash func. setting] option. Select
[Flash exp. comp] (p.149).
The exposure compensation can also be set with the [2 Expo. comp./
AEB] menu (p.89).
88
Display the Quick Control screen.
1
With the shooting settings displayed,
press the <Q> button (p.38).
The Quick Control screen will activate
(7).
Select [y].
2
Press the <S> key to select [y*].
[Flash exposure comp.] will be
displayed at the bottom.
Set the flash exposure
3
compensation amount.
To make the flash exposure brighter, turn the
<6> dial to the right. (Increased exposure)
Or to make it darker, turn the <6> dial to
the left. (Decreased exposure)