center slides

Hi All
Love this plugin Simple but effective and supports shortcodes from other plugins

i am designing a page with full screen slides as adverts with the site content to be shown on a tv screen
so far i have hidden the coda-nav , coda-nav-left and right
i wish to make the contents centred on the screen at present they are slightly to the left just cant figure out which setting to change to centre the posts

https://wordpress.org/plugins/wp-coda-slider/