http://www.npbmto.gov.tw/NPBO_C/Web/Data/Board/456-4.tif has seven parts,
$ identify 456-4.tif
456-4.tif[0]
456-4.tif[1]...
but using image-mode, one would never see or know more than the first.
I've added the same support that we currently have for multi-image GIF files
to the TIFF support in CVS trunk.
This doesn't really help the user discover that multiple images exist, and
there isn't currently a convenient way for non-programmers to select such
subimages for display, so I'm leaving this open as a wishlist for now.
I can't find information about how to display (in Elisp) the
various images. Could someone clue me in as to where to find that info
(etc/NEWS or Elisp manual) or if it's not there, could someone add
it there?