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# 2002.01.20 06:25 "TIFF files from Photoshop 6", by Jeffrey Mcarthur

If you run PDFTeX, which uses the libtiff library, and try and include a
TIFF file generated by Photoshop 6 you get a pop-up dialog:

"Unknown field with tag 37724 (0x935c) ignored"

I did a little research, and found the following information:

> Photoshop 6.0 uses 4 more tags that are not defined in the TIFF v6
> specification. They are: tSubIFD (330), tJPEGTables (347), tImageSourceData
> (37724), and tAnnotations (50255). tSubIFD is documented in the TIFFPM6.
> pdf file as a PageMaker extension. tAnnotations are discussed earlier in
> this chapter, the TIFF tag does not include the first 12 bytes of the
> Annotation. The details for the remaining tags are in the tables at the end
> of this section.
> tImageSourceData is a null-terminated string identifying the type of data in
> the tag followed by the data for the tag. See the tagged resources found
> earlier in this document.

That description is found on page 42 of Adobe Photoshop 6.0 File Format
Specification which was found at: