User`s guide
14
Visual
Effects
Of
Screen
And
Page
Lengths
The
combination
of
page
and
screen
lengths
influence
the
number
of
displayable
data
lines.
For
example,
if
the
page
length
is "50" (25 x 2),
and
the
screen
length
is 44
lines,
the
number
of
data
lines
that
are
visible
at
any
one
time
is
43,
with
no
label
line.
The
other
line
is
used
for
the
top
status
line. On a
49
line
screen,
48 of
the
50
data
lines
are
visible
at
one
time.
If
the
page
length
is
shorter
than
the
screen
length,
then
blank
lines
will be
present
below
the
data
line or
statusjlabelline.
If
the
page
length
is
larger
than
the
allowable
number
of
data
lines,
this
will
cause
some
of
the
rows
to be
out
of view. In
order
to
bring
them
into
view, "scrolling" or
"panning"
is
used,
as
necessary.
Scrolling
causes
a
new
line
to
scroll
into
view
when
the
cursor
advances
past
the
last
row or
first
row
on
the
page.
If
the
page
is
scrolled
down,
the
top row of
text
is
lost,
and
if
scrolled
up,
the
bottom
row of
text
is
lost
(if
Auto
Scroll
is
"on" in
Setup).
Text
scrolled
off of
the
screen
is
not
recoverable.
If
the
current
page
or
portion
of
the
page
is
longer
than
the
screen
display
or
window
in
which
it is
displayed,
then
local
keystrokes
can
be
used
to
"pan"
the
window
up
or
down
(Ctrl-i
and
Ctrl-A ). As a
window
is
panned
up,
the
page
appears
to be
moving
down
and
the
opposite
is
true
when
panning
the
window
down.
Text
that
is
panned
off
the
screen
is
out
of view,
but
is
not
lost.
The
figure
below
represents
the
display
screen
with
a
48
line
page
length
on a
44
line
screen,
after
panning
the
window
down
2
lines.
I
-f
Data Lines (Non-Viewable)
/1-2
/
----
<:-:Top~tafuSLJn~7
-
. i
44 Line
Screen
Data Lines (Viewable)
3-44
148Line
•Page
I
Data Lines (Non-Viewable)
45-48