The Sony readers can handle .pdfs fine, so any graphical content ``just works'' so long as the pages are formatted for the screen size of the readers.
It's far easier to download an updated file than it is to re-copy all of the errata into a printed book.
Flipping back and forth feels slower 'cause of the slow screen re-fresh and need to press-hold the page forward/backward button to move by 10 pages, but going directly to a given page # (the more typical scenario in classes IME) is quite a bit more direct.
William
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