Canon EOS REBEL T4I Instruction Manual page 74

Cautions for <[]>
When shooting flash photography, if the subject is too close to the
camera, the pic[ure may come out extremely bright (overexposure).
If you use flash when shooting dimly lit night scenes, or human subjects
in situations where the subject and background are both near enough to
be illuminated by the flash, the shots may not align correctly. This can
result in a blurry photo.
Shooting with an external Speedlite
* When using a Speedlite with automatic flash coverage setting, the
zoom position will be fixec to the wide end. regardless of the lens' zoom
position.
, When using a Speedlite with manual flash coverage switch, shoot with
the flash head retracted to the wide mormal) position.
Cautions for <_:->
Note that the image may not be rendered with a smooth gradation and
may look irregular or have significant noise.
HDR Backlight Control may not be effective for excessively backlit
scenes or extremely high-contrast scenes.
Cautions for <l_> and <,_:->
Compared with other shooting modes, the shooting area will be smaller.
_+d L or _ cannot be selected. With other shooting modes, if
_+dL or _ is set, the picture will be recorded in _L.
If you shoot a moving subject, ghost-like images of the subject may
result
The image alignment may not function properly with repetitive patterns
(lattice, stripes, etc.), fiat or single-tone images, or greatly misaligned
shots caused by camera shake.
Compared to normal shooting, recording the image to the card will take
longer. During the processing of the images, "BUSY" wil! be displayed
and you cannot take another picture until the processing is completed.
If the Mode Dial is set to <1_> or <,_:'>, direct printing is not possible.
Select other mode and perform direct printing.
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