Canon 30D - Manual (Page 7)

Page 7 of 35 © Ken Rockwell 2006
The Green Rectangle mode sets everything all by itself. It disables much of
the other adjustments about which I'll be writing in these pages. I only suggest
the green rectangle mode for loaning your 30D to your mom. There's nothing
wrong with it for starters, but defeats most of the adjustments you're here to
learn.
The other modes are cute scene presets (portrait, sports, etc.) I don't use
them. Instead I use Program mode and spin the front dial as needed to select
fast shutter speeds for sports or big apertures for portraits or small apertures
for landscapes. Many of the adjustments I'll be explaining are locked out in
these preset modes.
Feel free to use any of these modes if they work for you. If you want to make
more advanced adjustments in the future you may have to change to one of
the P, Tv, Av or M modes above.