Canon EOS REBEL T5I Instruction Manual page 28

Menu Function Settings
@ Metering timer _
You can change how long the exposure setting is displayed (AE lock
time). In Basic Zone modes, metering timer is fixed at 16 sec.
[] The Live View shooting Wil! step with anyof the following operations . To
resume Live View shooting, press the _1:_> button again,
When se!ecting [_3: Dust Delete Data], [_'3: sensor !cleaning ],
[_t4: C!ea r settings], or [_4: It_ firmware vet.]
Even if a !ow JSO speed is set, nois_ may be noticeable in the displayed
Live View image under !ow !ight, However, when you shoot, the image
recorded will hsve minima} noise. (The image quality of the Live View
image i s different from that of the recorded image_)
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