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FORMS LAYOUT CONSIDERATIONS
XEROX DOCUPRINT 96/DOCUPRINT 96MX LPS FORMS CREATION GUIDE 5-5
Landscape pages Line density restrictions differ as a function of the mode (landscape
or portrait) of the form. An 8-point or smaller landscape font is smaller
than 32 dots for 300 spi and 64 dots for 600 spi. A vertical line is a
single dispatchable item. A horizontal line is treated as a series of
lines that are 32 dots in length joined end-to-end.
For 300 spi, this means that a form using an 8-point or smaller font
on a landscape page may have up to 318 characters (plus a two-item
overhead, resulting in 320 dispatchable items) on a scan line. When
using a 6-point font, it is possible to have, for example, 132
characters, a line across the page under the text, as well as 80 to 90
vertical lines, without exceeding the line density limitations.
If a form requires a 9-point or larger font, the number of characters
that may be imaged on a landscape page is reduced to 160 because
the characters are generally more than 32 dots wide. While the
dispatchable-item count remains 320 per line, fonts 9 points and
larger use two dispatchable items per character. Since a character in
a large font constitutes two dispatchable items, only half as many
characters in a large font may be imaged on a scan line as is possible
with a smaller font.
Portrait pages Restrictions for a portrait page are significantly different from those
for a landscape page because the system always images in a
landscape direction. Therefore, if a page is formatted as a portrait
page, the hardware must take the time to reorganize the data into
landscape prior to imaging.
Thus, for a 300-spi portrait page, this drops the dispatchable-item
count below the 320-character level when a 12-point font is used.
That is, with a 12-point font, a form may have not more than 160
characters on a scan line.
When using an 8-point 300-spi font on a portrait page, the maximum
dispatchable-item count permitted is approximately 200 per scan
line. This limit falls off gradually to 170 characters for a 6-point font,
150 characters for a 5-point font, and 120 characters for a 4-point
font.
If printing at 600 spi, the same size character or length line has twice
as many dots.
Page generation errors
Generally, a form is imaged along with variable data. It is possible to
create a form that prints correctly when sampled but cannot be
successfully overlaid on certain variable data pages. The LPS may
not have enough time to merge a complex form with a large amount
of variable data within the limits of the throughput environment. In this
case, either the amount of variable data can be reduced, or the form
simplified. By reviewing the broken page, you can determine the
approximate location of the failure and try to reduce the number of
characters and lines in that area. It is important to recognize that
most imaging problems are local density of information problems
rather than page-wide problems.