FONT and PGPLOT_RGB, PGPLOT looks for the files it needs at run-time in this directory. The binary font file is <code>grfont.dat</code> and the color-name database is <code>rgb.txt</code>. If this variable is undefined, or if the specified file does not exist in this directory, PGPLOT looks in the current default directory. e.g. 

<pre>setenv PGPLOT_DIR /usr/local/lib/pgplot/
</pre>
</dd>

<dt>PGPLOT_FONT</dt>

<dd><i>File name for the binary font file.</i> If this variable is defined, PGPLOT will interpret