12-12-2013 01:19 PM
the canon 7d 19 point auto focus seems not to be working properly. It only gives you one square when you press the button half way down and will not chage.
12-12-2013 01:51 PM
You are likely in manual AF point selection mode. Your manual explains how to change modes.
Also... there's a whole series of videos you can watch to learn more... start with these two:
There are many more.