Canon EOS Rebel T4i 18-135mm IS STM Lens Kit Instruction Manual page 193

Grid display
With [Grid 1l] or [Grid 2m], you can display grid lines to help
you level the camera vertically or horizontally.
Metering timerN
You can change how long the exposure setting is displayed (AE lock time).
Movie recording size
You can set the movie recording size (image size and frame rate).
For details, see pages 181-182.
Sound recordingN
Level meter
[Sound rec./Rec. level] options
[Auto] : The sound-recording level is adjusted automatically.
Auto level control will operate automatically in
response to the sound level.
[Manual] : For advanced users. You can adjust the sound
recording level to one of 64 levels. Select [Rec. level]
and look at the level meter while pressing the <U>
key to adjust the sound recording level. While looking
at the peak hold indicator (approx. 3 sec.), adjust so
that the level meter sometimes lights up the "12" (-12
dB) mark on the right for the loudest sounds. If it
exceeds "0", the sound will be distorted.
[Disable] : Sound will not be recorded.
3 Movie Menu Function Settings
Normally, the built-in microphone will
record stereo sound. If a commercially-
available microphone equipped with a
mini plug (3.5 mm diameter) is
connected to the camera's external
microphone IN terminal (p.20), it will be
given priority.
193