Press
the RETURN key
twice
to
put
two
more
empty
lines on the screen. This
is
like using the
RETURN on a
typewriter
to
putspace
between
lines
of
text.
SCREEN
6
Now
that
you
have pressed RETURN
many
times,
the
cursor
is
getting
closer
to
the
bottom
of
the screen.
We
have seen
that
the cursor
will
wrap
around horizontally. Will
it
wrap
around
vertically,
too
7 Keep pressing the RETURN key
to
make the cursor move
to
the
bottom
of
the
screen.
SCREEN
7
When the cursor reaches the last line, press
RE-
TURN again. Instead
of
the cursor moving, the
whole
screen moves!
The
cursor stays
at
the
bot-
tom, and the
whole
screen moves
up
. The
top
line gets shoved
off
the screen and
cannot
be
retrieved.
If
you
press RETURN enough times,
you
will
get
rid
of
all the lines on the screen.
Moving
all the
lines
up
off
the screen in this manner
is
called
scrolling.
SCREEN
8
When
you
have a
BASIC
cartridge (or
any
other
programming language) in
your
Atari, the
RE-
TURN key has
another
function. This function
is
described in the next exercise, "RETURN
KEY
:
BASIC."
55
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