Canon EOS 7D Instruction Manual page 20

Nomenclature
Mode Dial
Camera User Settings
Most camera settings can be registered under w,
x, or y (p.223).
20
F : Bulb (p.107)
a : Manual exposure (p.102)
f : Aperture-priority AE (p.100)
s : Shutter-priority AE (p.98)
d : Program AE (p.96)
Fully-Automatic Modes
All you do is press the shutter button.
Fully-automatic shooting suitable for the
subject.
1: Full Auto (p.50)
C: Creative Auto (p.53)