I have some more information about this feature:
Quote:
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Improved Tables Experience: Reading and navigating tables inside your books has been improved with optimized rows and column spacing, a pagination indicator to preserve context for multi-page tables, and a new pop-up table viewer with zoom and pan capabilities so you can interact with large tables at any font size.
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In my ongoing efforts to understand the KFX format I have been monitoring a large number of books over time. When enhanced typesetting was introduced the majority of them were made available in that format, but many were not. The initial implementation of the KFX renderer supported only the most common book features.
Over time older books have been made available as KFX in groups as more features were added to the KFX rendering software. Initially no books containing HTML tables were available in KFX. Then books that used tables merely as a means to format small portions of text were added. Recently support for large tables was added.
Amazon has taken an odd approach to rendering tables. Code has been added to books in the KFX format to invoke the new pop-up table viewer, but only for content that they deem to be a "data table". (How they decide which HTML tables deserve this treatment is not completely clear to me.) The latest Kindle firmware and apps added support for this code.
I haven't checked to see whether or not anything has changed for books rendered in the older MOBI and AZW3/KF8 formats, but I doubt it.