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Apple IIe - Page 278

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278
Apple lie Users
Handbook
cursor
movement.
However
,
after
a single
keystroke
,
the
com-
puter
automatically
exits
the
escape
mode
.
Moving
the
cursor
up
one
row
would
require
either
of
the
following
key sequences:
ESC
D
or
ESC
f
SPACE
To
move
the
cursor
up
four
rows
would
require
either
of
the
two
following
key sequences.
ESC
D
ESC
D
ESC
D
ESC
D
ESC
f f
f f
SPACE
Use
of
ESC
,D
is
cumbersome
for
cursor
moves
of
more
than
a
few
rows. The same idea applies
to
the
use
of
ESC
,A,
ESC
,B, and
ESC
,
C.
Editing Functions that Clear
Parts
of
the
Display
It
is
often
necessary
to
clear all
or
parts
of
a display,
so
that
new
information
can
be
displayed
neatly. The simplest
of
the
~om
mands
in
this
category
is
the
Clear Screen
command.
When
a
CONTROL-L
is
issued,
either
through
the
keyboard
or
in
a
program
,
the
display
is
cleared and
the
cursor
is
positioned
in
the
upper
lefthand
corner
of
the
screen.
CONTROL-L
clear screen
A si
milar
command
is
the
"clear
to
end
of
screen"
command.
When
the
CONTROL-K
command
is
used,
the
screen
is
cleared
from
the
current
cursor
position
to
the
end
of
the
screen. The