Canon EOS 600D - Manual (Page 104)

Setting Exposure CompensationN
104
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.
1
Press the <Q> button. (7)
X The Quick Control screen will appear
(p.41).
2
Select [y].
Press the < S> key to select [y*].
X [Flash exposure comp.] will be
displayed at the bottom.
3
Set the flash exposure
compensation amount.
To make the flash exposure brighter,
turn the <6> dial to the right.
To make it darker, turn the <6> dial
to the left. (Decreased exposure)
X When you press the shutter button
halfway, the icon will appear in
the viewfinder.
After taking the picture, cancel the
flash exposure compensation by
setting it back to 0.
y Flash Exposure Compensation
If [2 Auto Lighting Optimizer] (p.109) is set to any setting other than
[Disable], the image may look bright even if a decreased exposure
compensation or decreased flash exposure compensation has been set.
You can also set flash exposure compensation with [Built-in flash func.
setting] in [1 Flash control] (p.181).