After you have built the font using your system's font-compiler,
installed it in some directory, and run `mkfontdir` or your system's
equivalent (e.g. bldfamily for OpenWindows) in that directory, be sure to use
`xset +fp $dir` to add that full path-name to the server's font-path, *or* if
the directory is already in the path, use `xset fp rehash` so that the new
fonts in that directory are actually found; it is this last step that you're
probably leaving out. (You can also use `xset q` to make sure that that
directory is in the path.)
	Sometimes your "xset +fp $dir" command fails with a BadValue error:
		X Error of failed request:BadValue
			(integer parameter out of range for operation) 
		Major opcode of failed request:  51 (X_SetFontPath)

	This means the X server cannot find or read your font directory, or
that your directory does not look like a font directory to the server.  (The
mention of an "integer parameter" in the message is spurious.)

-- Is the font directory you're specifying readable from the SERVER's file
   system?  Remember, it's the server, not the client, which interprets your
   font directory.  Trouble in this area is especially likely when you issue
   an xset command with shell metacharacters in it (e.g. "xset +fp ~/myfonts")
   and the server is an X terminal or managed by xdm.

-- Is the directory really a font directory?  If you're running the sample X
   server (or most varieties of vendor servers) look in the directory for the
   file "fonts.dir".  If you can't find that file, run mkfontdir(1). (If you're
   running OpenWindows, look for the file "Families.list".  If you can't find
   it, run bldfamily(1).)

-- If you're in a site where some people run X11Rn servers and others run a
   proprietary server with nonstandard font formats (OpenWindows, for
   example), make sure the font directory is right for the server you're
   using.  Hint: if the directory contains .pcf and/or .snf files, it won't
   work for Open Windows.  If the directory contains .ff and/or .fb files, it
   won't work for X11Rn.

[thanks to der Mouse (mouse@larry.mcrcim.mcgill.edu) and to Oliver Jones
(oj@pictel.com); 7/92 ]

Note: some systems (e.g. X11R4 on AIX) need a trailing '/' in the directory
name.