tween graphical output and other program activity. e.g. 

<pre>setenv PGPLOT_BUFFER yes
</pre>
</dd>

<dt>PGPLOT_DEBUG</dt>

<dd><i>Switch.</i> If this variable is defined, with any non-null value, PGPLOT will print some debugging information on the standard output. Currently this includes attempts to open input files (binary font file and color-name database), and, when the null device is selected for output, statistics of device-driver calls. e.g. 

<pre>setenv PGPLOT_DEBUG yes
</pre>
</dd>
</dl>

<p>In a