Adobe ACROBAT 9 HOW-TOS Manual page 108

check box and click OK. The same document, without benefit of local
fonts, is shown in the lower heading example of Figure 37b.
Figure 37b Unless you have permission, a locked font (upper heading) is
replaced by a default font (lower heading)—the Viking is purely decorative!
The difference is clear. The font used—Everyday Formula—is a locked
font and can't be embedded. If I sent someone this document, my spiffy
headings would be replaced by something far tamer.
You can check the Document Properties for confirmation. Choose
File > Document Properties and select the Fonts tab to show the font
information (Figure 37c). The information for the Everyday Formula
font is as you would expect: The dialog states that the actual font used
is Adobe Sans MM.
Figure 37c
The Document Properties
dialog lists information for the embedded,
subset, and substituted fonts.
#37: Choosing and Using Fonts
Embedding and
Subsetting
Embedding means that
information about all the
characters in the fonts is
automatically attached
for use after the document
is converted to a PDF.
Subsetting refers to a
percentage of the font's
information based on the
number of characters used
in the document.
When you embed a font,
the text in the document
using that font displays cor-
rectly. Preserve the content
precisely using subsetting.
It's a good idea to subset at
100%—the difference in
file size is hardly noticeable.
If you use half of the pos-
sible characters in a font and
subsetting is set to 100%,
all your information is used.
If you use half the possible
characters in a font and
have subsetting set at 25%,
other characters may be
substituted.
Subsetting is important for
documents sent to a print
service or press. When the
document is printed, it uses
the information in your
document, not that of the
printer's version of the font,
ensuring precise results.
From the Library of Daniel Dadian
97