Canon EOS 750D Instruction Manual page 205

Metering timerK
You can change how long the exposure setting is displayed (AE lock
time). In Basic Zone modes, metering timer is fixed at 8 sec.
Selecting any of the following operations will stop Live View shooting. To
start Live View shooting again, press the <A> button.
• [z3: Dust Delete Data], [53: Sensor cleaning], [54: Clear settings],
or [54: z firmware ver.]
3 Menu Function Settings
205