/'1
Cursor Positioning
All
LaserJet
family
printers
allow cursor positioning using
rows/columns
and
decipoints. Both methods
are
explained below.
NOTE:
The
terms "cursor position" and "current active position"
are used interchangeably in this manual. (LaserJet+
and
LaserJet
500+
printers also allow
cursor
positioning in dots, in addition
to
rows/columns
and
decipoints-see Chapter III.)
HORIZONTAL
CURSOR
POSITIONING
(USING
COLUMNS)
The
following escape sequence moves the
current
active cursor
position
to
a new
character
position
on
the
current
line. This
movement
is
based
on
the
current
print pitch (or Space character
width
for
proportional
fonts).
Ec&a#C
# = Horizontal position (in columns)
The
value field
(#)
specifies the horizontal position; a plus (+)
or
minus
(-)
sign in
front
of
the
value indicates
the
new
position
is
relative
to
the
current
active
position (+ moves cursor # columns
to
the right
and
- moves cursor # columns
to
the
left). When no
plus
or
minus sign
is
indicated in the value field.
the
position
is
absolute--the first
column
in the line being
column
O.
To
move
the
current
active printing position
to
column 47,
for
example,
you would send
the
Ec&a47C escape sequence.
Another
way
to
do
this, assuming you
are
at
column
40
and wish
to
move
to
column 47,
is
to
send
the
Ec&a+7C sequence--the +7 in
the
value
field specifies
that
you
want
to
move 7 columns
to
the
right
of
your
current
position.
This escape sequence ignores margins and
can
therefore
be used
to
set
the
current
active position
to
any location along
the
present
line (within
the
physical limits
of
the printer).
If
a request
is
made
for
a location outside the printer's physical limits,
the
current
active position will be moved
to
the limit
on
that
side
(left
or
right). NOTE:
Chapter
IV of this manual lists the
maximum printable limits
of
the LaserJet family printers.
2-15
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