View Full Version : What purpose do thumbnail images serve?

08-06-2013, 08:34 PM
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.


- Byron

08-07-2013, 05:13 AM
Never seen that, but I think it is a leftover of the process used.

08-07-2013, 07:22 AM
MOBIs had/have thumbnail images in addition to the "full size" covers that were/are used by various reading apps. Perhaps it's a conversion remnant -- and/or they're used for "bookshelf" views in various reader apps.

08-07-2013, 07:29 AM
For some books from web sources, the original displays a thumbnail which you can click on to see the full-size image in a popup window. This doesn't work so well in smaller readers, so the supporting html (<target> for instance) is removed. They should have removed the thumbnails too, but apparently didn't.