View website : Fixed Width & Height - Center justified not 100% width & height

[Benjamin Chassot]

Is there a way to modify my sitebuilder website that are fixed width & height + center justified. It depends of the screen resolutions, but nowadays as sales of big screen are stongly increasing... I would like to fix that matter. Having the layout stretched across the entire screen is awful.

Changing page after page is obviously not the solution. Is there a way to add some css scripts in the styles.css or somewhere else to get the website layout I want?

Looking for hints & tips.

Cheers