Canon EOS REBEL T7i Instruction Manual page 286

N Shooting Time-lapse Movies
Disable

The Live View image will remain displayed during shooting. Note
that the LCD monitor will turn off when approx. 30 min. elapse after
the shooting started.
Enable

The LCD monitor will turn off approx. 10 sec. after shooting the first
frame.
You can press the <B> button to turn off or on the LCD monitor during
shooting.
Playback
Time required
time
If [53: Beep] is set to [Disable], the setting in step 7 cannot be set.
286
Set whether to turn off the LCD
6
monitor automatically.
Select [LCD auto off] and set.

Set the beeper for shooting.
7
Select [Beep as img taken] and set.

If [Disable] is set, the beeper will not

sound for shooting.
Check the settings.
8