[Plugin: WP UI – Tabs, Accordions, Sliders] How to make pagination post button big and in centre

I want to break my post if the content are big for single post, page break works and also create pagination buttons below the end of post but these are very small and in the left side, how could I make them bigger in size and also placed in center.
Thanks for early response

http://wordpress.org/extend/plugins/wp-ui/