Canon EOS 620-650 User Manual page 26

(Focus)
Focus these subjects as follows:
1. Auto focus a substitute subject at the same distance from
the camera as your main subject, and then recompose the
picture (A)
2. Hold the camera vertically and focus the subject using
auto-focus then recompose the picture (C)
3. Manually focus the subject following the steps on the next
page.