Canon EOS-1D X Mark II DSLR Camera (Body Only) - Manual (Page 76)

Before You Start
76
You can prevent the beeper from sounding when focus is achieved.
1
Select [Beep].
Under the [ z 3 ] tab, select [ Beep ],
then press < 0 >.
2
Select [Disable].
X The beeper will not sound.
To save battery power, the camera turns off automatically after a set
time of idle operation elapses. The default setting is 1 min., but this
setting can be changed. If you do not want the camera to turn off
automatically, set this to [
Disable ]. After the power turns off, you can
turn on the camera again by pressing the shutter button or other
buttons.
1
Select [Auto power off].
Under the [ 5 2 ] tab, select [ Auto
power off ], then press < 0 >.
2
Set the desired time.
Select the desired setting, then press
<
0 >.
3 Disabling the Beeper
3 Setting the Power-off Time/Auto Power Off
Regardless of the [ z 3: Beep ] setting, touchscreen operation sound is
disabled during Live View shooting and movie shooting. However, when
focus is achieved with AF, the beeper (focus confirmation beep) will sound
depending on the [
z 3: Beep ] setting.
Even if [ Disable ] is set, the LCD monitor will turn off automatically after
approx. 30 min. to save power. (The camera’s power does not turn off.)