
ChaptEr 2 Design: Denition and Devices 51
Consistency
Consistency is a cornerstone of good design. When similar items are expressed
in similar, repetitive ways, it creates consistency. There are two main forms of
consistency that digital designers need to be aware of: aesthetic consistency
and functional consistency.
Aesthetic consistency refers to style
and appearance. A good example of this
is seen in corporate identity and branding
design. Companies use the same color,
fonts, and icons throughout their marketing
materials (brochures, packaging, signage,
etc.) to create a consistent experience for
the customer through recognition and
association. Aesthetic consistency also
needs to be evident in the images that are
used. Mixing illustrations with photos in a
sequence of images may hurt the consis-
tency of the visual whole, or gestalt. There-
fore, you should keep sequential items the
same in style (photo vs. line art illustration)
and size.
Functional consistency yields coher-
ence in meaning and action. That is why
it is a key component in Web site design,
where usability (the ability of the site user
to succeed) and learnability (the ability to
ensure knowledge transfer) is paramount
(Lidwell et al. 2003, 46). Functional con-
sistency affects the placement of naviga-
tion buttons, the way media controls such
as start and stop buttons work, and the
ease of use of online forms. Functional
consistency also creates implied meaning
for users so that they can be transparently
guided by hierarchy.
Figure2-21 K e e p i n g
image types the same
and creating navigation
symbols that rely on
recognition rather than
recall are critical rules for
consistent design. Design
by Kind Company.
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