** Emacs can be compiled with zlib support. If this library is present
(which it normally is on most systems), the function
-`zlib-decompress-gzipped-region' becomes available.
+`zlib-decompress-region' becomes available, which can decompress gzip-
+and zlib-format compressed data.
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** Emacs for NS (OSX, GNUStep) can be built with ImageMagick support.