[Plugin: Slider Revolution] Background php certain pages

I put the<?php code for this slider in the header.php and it worked fine. However I would like for the slider to be the background of the site. Not just in the header. The documentation says:

* From the theme html use: <?php putRevSlider( “alias” ) ?> example: <?php putRevSlider(“homeslider”) ?>
For show only on homepage use: <?php putRevSlider(“homeslider”,”homepage”) ?>
For show on certain pages use: <?php putRevSlider(“homeslider”,”2,10″) ?>

Where do I put the code if i want it to show on certain pages but also display on the entire background? So that regular content is over the slider.

thanks