Atari 400 User Manual page 90

In the Control letter Mode, you can create fig-
ures on the screen by combining the graphics
symbols of various letter keys. (You can also
make graphics in the Inverse Mode, to create
even more interesting pictures on your screen.)
Now press a SHIFT key with the CAPS/lOWR to
return to normal uppercase characters. Type the
A, S, 0, and F keys again, and you see that
you're back to normal uppercase letters.
SCREEN 3
If you press the CONTROL key with a number
key, different kinds of things happen. The control
function of any key may be changed according
to the particular software you are using.
You will not need to press CONTROL-I (the
CONTROL key plus the I key) as long as you are
not running a program. When you are running a
program, the first time you press the CONTROl-
I key combination, the program will pause; press
the combination again and the program will
continue. You'll see how this CONTROL-I com-
bination works later in the exercises on using
the BASIC language.
CONTROL-2 causes the bell to sound, even in
the Memo Pad Mode. The bell will sound like a
beep.
Key combinations CONTROL-3 through
tONTROL-O do nothing in the Memo Pad
Mode. In some (but not all) programs they
88