Canon EOS REBEL T7I Basic Instruction Manual page 136

Changing the Autofocus OperationN
One-Shot AF for Still Subjects
Suited for still subjects. When you press the shutter button
halfway, the camera will focus only once.
When focus is achieved, the AF point will turn green and the beeper

will sound.
The focus remains locked while you hold down the shutter button

halfway, allowing you to recompose the image before taking the
picture.
When the drive mode is set to <o> for high-speed continuous

shooting, the maximum continuous shooting speed is approx. 6.0
shots/sec.
When the drive mode is set to <i> for low-speed continuous

shooting, the maximum continuous shooting speed is approx. 3.5
shots/sec.
For flash photography, the continuous shooting speed will become

slower. Regardless of the <o> and <i> settings, the continuous
shooting speed will be the same (max. approx. 2.0 shots/sec.).
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