On my system I have ImageMagick and its documentation installed:
$ apt-cache pkgnames imagemagick imagemagick imagemagick-6.q16 imagemagick-dbg imagemagick-doc imagemagick-common I can access convert's man page, which tells me SEE ALSO ImageMagick(1) if I want to know more.
man ImageMagick says No manual entry for ImageMagick.
And finally, man -k imagemagick says:
quantize (5) - ImageMagick's color reduction algorithm. How do I access ImageMagic's man page on my system?
Hold on
Hold on, I think I've almost figured this out.