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.239).
20
F : Bulb (p.111)
a : Manual exposure (p.106)
f : Aperture-priority AE (p.104)
s : Shutter-priority AE (p.102)
d : Program AE (p.100)
Fully-Automatic Modes
All you do is press the shutter button.
Fully-automatic shooting suitable for the
subject.
1: Full Auto (p.52)
C: Creative Auto (p.55)