Canon EOS 1000N - Manual (Page 29)

This camera focuses on the subject co­
vered by the focus mark in the center of
the viewfinder. For off-center subjects, use
focus lock to set the focus and then recom­
pose the picture as desired.
1) Cover the subject with the focus mark
and press the shutter button halfway.
2) Keeping the shutter button pressed half­
way, recompose the picture as desired
and then press the shutter button all the
way down to take the picture.