Generally, opening links in new windows is regarded as bad usability and accessibility practice,
but in this case, users expect a thumbnail to open a new window with a larger image.
The one and only concrete rule about this entire discussion is to never make a thumbnail
link to an image that is not bigger. If a higher-resolution version with increased detail is
unavailable, do not link the thumbnail.
Occasionally readers are provided more than one high-resolution image. If you are providing
an individual link to each, the anchor text of the links must be explicit, so readers
know what they are clicking to. (You might even provide miniature thumbnails next to
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each, but make sure actual text accompanies the small images, otherwise the audience will
just see a group of ambiguous pictures.) In our example layout in Figure 7-5, you can see
links designed with increasing complexity.
Figure 7-5. Showing additional high-resolution images can be done with
different levels of complexity.
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