
Legibility and readability
We read best what we are used to reading. It’s best to avoid
idiosyncratic typographic features, because they can be
unwelcome distractions to a reader. Don’t make long text
documents harder to read—it’s difficult enough as it is to
get people to read them.
Because people have a finite amount of time to spend
reading, there is an emphasis on the speed and accuracy of
their comprehension. This puts great importance on the
ability to achieve clarity of letterforms and to maintain
correct emphasis within the text. What you do with your
chosen typeface to enable the reader to find and understand
the material being presented is paramount.
A major inhibitor to smooth reading is inconsistency. Be
consistent in:
r headings, once you have established an appropriate
hierarchy
r the style for references and cross-references
r spelling
r punctuation
r the structure of information.
READ MORE ABOUT IT
Rolf Rehe, Typography: How to make it most legible, Design Research
International, Carmel, Indiana, 1984.
Colin Wheildon, Communicating or just making pretty shapes, 3rd edn,
Newspaper Advertising Bureau of Australia, Sydney, 1990.
Line length
Optimum line length is generally considered to be between
1.5 and 3 alphabets or, given the alphabet contains
26 letters, 39–78 characters (which is sometimes rounded
up to 40–80 characters) or, for people who prefer a single
figure to a range, 60 characters. It largely depends on
which publications you read.
The range is more useful than the absolute. The number
of characters per line in various typefaces and formats will
change, so you will not be able to achieve the absolute of 60
in every setting, and that does not necessarily mean that
your readability is compromised. A range also implies that,
if you go beyond the range, you are entering potentially
difficult areas.
In any case, line lengths that are near the upper limit
will need more leading than those near the lower. This
enables readers’ eyes to accurately and consistently drop to
186 Production
DOING IT FASTER
Measuring optimum
line length
In order to quickly decide how wide
your columns could be without
counting, find a type catalogue that
presents settings of the lower-case
alphabet of each font in different
sizes. Simply measure the setting of
the lower-case alphabet in the size
you intend using and multiply it from
1.5 to 3 times to determine the range
for optimum line length. Then
consider whether your format or
grid allows a line length within
that range.
DOING IT SMARTER
A personalised type
catalogue
Create your own type catalogue by
typing up the alphabet in all caps and
then in lower case, a set of numbers
and punctuation marks. Caption it
with font and size information.
Duplicate it numerous times,
selecting the size options you are
most likely to use, remembering to
revise the caption. Print it out. Then
select the whole page and allocate a
different typeface and print it out,
too. Do this for all the typefaces you
have and generate new pages when
you invest in a new face.
DWD-DM06 7/5/01 12:56 PM Page 186