Canon EOS 70DN Basic Instruction Manual page 408

Using AF to Focus (AF Method)
When [Quick mode] is set, [Continuous AF] will automatically be set to
[Disable].
Quick mode cannot be set for movie shooting.
You cannot take a picture during autofocusing. Take the picture while the
Live View image is displayed.
244
The AF point (or zone) selection will
change in the direction you tilt <9>.
If you press <0>, the center AF
point (or center Zone) will be
selected.
You can also use the <6> and
<5> dials to select the AF point.
3
Focus the subject.
Aim the AF point over the subject and
press the shutter button halfway.
The Live View image will turn off, the
reflex mirror will go back down, and AF
will be executed. (No picture is taken.)
When focus is achieved, the beeper
will sound and the Live View image
will reappear.
The AF point used to focus will light
up in green.
If focus is not achieved, the AF point
will blink in orange.
4
Take the picture.
Check the focus and exposure, then
press the shutter button completely to
take the picture (p.216).