FORMS LAYOUT CONSIDERATIONS
•
If text is to be placed in the next box horizontally, FDL
begins searching at the upper right corner of the box in
which previous text was placed.
•
If text is to be placed in the next box vertically, the search
begins at the lower left corner.
Error calculations
Horizontal errors
The calculations made for horizontal errors (for example, too
many characters in a line) are usually accurate. FDL uses the
following formula for reporting horizontal errors:
S = P * (B/T)
S
target point size
P
original font point size
B
width of the box in dots
T
width of the text in dots
Vertical errors
The calculation made by FDL for vertical errors (for example, too
many lines in the box) is a rough approximation of the actual size
of text, and the computation may, in fact, be larger than the font
for which an error message was given. This is because the FDL
system of reckoning does not take into account the leading used
within the font or provided by line spacing specifications.
The formula used by the error-handling routine to compute text
size when the box is too small in a vertical direction is:
S = (72/300) * (D/N)
S
target point size
72
number of points in an inch
300
number of dots in an inch
D
distance between the top and bottom of the box (in dots)
N
number of lines that are involved
Figure 5-5 shows measurements used in computing vertical box
errors.
Figure 5-5.
Measurements used in computing vertical box
errors
The result of this equation is rounded up and displayed in the
error message. Thus, what the error message actually signifies is
that the largest font could be accommodated within the box if
no leading were involved.
5-8
XEROX 4850/4890 HIGHLIGHT COLOR LPS FORMS CREATION REFERENCE
