North Carolina Office of Information Technology Services 2004 web style guide.

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14: 2 Include Logos Place your organization’s
logo in a consistent place on
every page.
14: 3 Limit Large
Images Above the
Fold
Do not fill the entire first
screenful with one image if
there is text information
below the fold. The fold
being the area below the
bottom of the browser
window.
14: 4 Limit the Use of
Images
Use images only when they
are critical to the success of
a Web site.
14: 5 Label Clickable
Images
Ensure that all clickable
images are either labeled or
readily understood by typical
users.
14: 6 Use Thumbnail
Images to Preview
Larger Images
When viewing a full- size
image is not critical to the
content of the Web page,
first provide a thumbnail of
the image.
site is the organization’s
logo. When used
appropriately, images,
animation, video and audio
can add tremendous value
to a Web site. Graphics can
facilitate learning. ADA
compliance dictates that
designers provide an
introduction and a text
explanation of both
graphics and animation.
Many images require a
large number of bytes that
can take a long time to
download, especially at
slower connection speeds.
When images must be
used, designers should
ensure that the graphics do
not substantially slow page
download times. Thumbnail
versions of larger images
allow users to preview
images.
Label images to help users
understand them. Conduct
testing to help ensure that
Web site images convey
the intended message. In
14: 7 Graphics Should
Not Look Like
Banner Ads
Do not make important
images look like banner
advertisements or gratuitous
decorations.