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"My own suggestions would be: use a Serif font for body text (like Book
Antiqua or Times Roman) and use a Sans-Serif font for titles (headings) and
for a special terms in your body text (with some bold thrown on top of
that)."
A small point, but respectfully submitting an alternative to this
suggestion: use a sans-serif font such as Arial for body text.
Research has never been decidedly conclusive on using a sans-serif font for
body text as opposed to serif, but there is nagging evidence that there is a
proportion of the population that reads sans-serif much better than serif.
Serif, such as the ubiquitous Times New Roman, can appear to be too "busy"
and compressed for some readers, no matter what their educational levels.
Because of the semi-proportional attribute of a font like Arial, text is
more expanded, "cleaner", and easier to read.
And besides, the old rationales for using Times New Roman for body text are
as antiquated as the convention to wear a neck tie in an office without air
conditioning on a hot, humid day in Houston. You'd just want to open your
collar and feel comfortable, and Arial does just that in print.