Canon EOS REBEL T1 i/EOS 500D Instruction Manual page 57

Advanced Shooting
Techniques
In the Basic Zone modes, to prevent spoiled shots,
most functions are set automatically and cannot be
changed. In the
<
P
>
(Program AE) mode, you can set
various functions and be more creative.
~
In the
<P>
(Program AE) mode, the camera sets the
shutter speed and aperture automatically to obtain the
standard exposure.
The difference between the Basic Zone modes and
<
P
>
is
explained on page 198.
*
<
P
>
stands for Program.
*
AE stands for Auto Exposure.