Canon EOS REBEL T2I Instruction Manual page 72

Setting the Flash _
The built-in flash and external Speedlite settings can be set with the
menu. The [E×temat flash ***] menu options for external Speedlites are
applicable only to an attached EX-series Speedlite compatible with
the respective functions.
The setting procedure is the same as setting a camera menu function.
[Flash firing]
Semect [Fmash control].
_ Under the [_'] tab, select [Flash
control], then press <_)>.
_y,, T he flash control screen will appear.
_ Normally, set this to [Enable].
® if [Disable] is set, both the built-in
flash and external Speed[ire wH[
not fire. TNs is useful when you only
want to use the flash's AF-assist
beam.
[Built'in flash rune, setting] and [External flash rune, setting]
The [Built-in flash func. setting] and [External flash func. setting]
menus can set the functions listed on the next page. The functions
displayed under [External flash func. setting] will vary depending on
the Speedlite model.
_ Select [Built-in flash func. setting]
or [External flash func. setting].
_y,, T he flash functions will be displayed.
The functions not dimmed can be
selected and set.
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