What purpose do thumbnail images serve?
I'm not sure if this is the best forum for this question or not but, since I use epubs I'll ask it here.
I don't see it as much as I used to but I often still find ebooks that have a small thumbnail image included in the file. What purpose does this image serve? I can't say as I've ever found any hardware or software readers that actually use them. Are they some holdover from a bygone era that is no longer needed?
Just curious.
Thanks.
- Byron
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