subroutines.html#PGSCRN">PGSCRN</a> with this name as argument immediately after the graphics device is opened. On devices without a color lookup table, changing the background color only affects the color of elements explicitly drawn in color index 0. To ensure that the background of the entire view surface changes to the new color, it is also necessary to call <a href="subroutines.html#PGERAS">PGERAS</a> at the start of each page. e.g. 

<pre>setenv PGPLOT_BACKGROUND slateblue
</pre>
</dd>

<dt>PGPLOT_BUF