how can I use it on one template page only

There is a filter that allows you to control whether the plugin should be active for certain pages of the site enss-enabled – You could return false on this by default, and then only return true for the certain pages you want it enabled on

add_filter( 'enss-enabled', '__return_false' );

Then, for the page template you want it enabled on, you could do this:

add_filter( 'enss-enabled', '__return_true' );

put this in your header. This example only displays SS on the home page. use conditional tags to customise it

<?php if ( !is_front_page() ) : ?>
	<style>
	#supersized {
		display: none;
	}
	</style>
	<?php endif; ?>

dvize – That works, but only visually – There is also a filter availale “enss-enabled” that will completely prevent the markup from being output in the first place, so will be easier on things like page weight / client side rendering efforts – Using your example above, if you wanted to only display this on the front page, you could do something like this in your functions.php file

function myprefix_filter_supersized( $enabled ) {
    // Lets start with a known enabled state - Should be default anyways
    $enabled = true;    

    if ( ! is_front_page() ) {
        $enabled = false;
    }

    return $enabled;
}
add_filter( 'enss-enabled', 'myprefix_filter_supersized' );