 the value as a file name for the binary font file. If it is not defined, PGPLOT will look for the binary font file under name <code>grfont.dat</code> in the directory specified by PGPLOT_DIR. e.g. 

<pre>setenv PGPLOT_FONT /usr/local/pgplot/grfont.dat
</pre>
</dd>

<dt>PGPLOT_RGB</dt>

<dd><i>File name for the color-name database.</i> If this variable is defined, PGPLOT will interpret the value as a file name for the color-name database. If it is not defined, PGPLOT will look for the binary font file under