or go with oliv__'s suggestion: javascript:(function(){var a = document.getElementsByTagName('body')[0];a.style.maxWidth=630+"px";a.style.margin="auto";a.style

or go with oliv__'s suggestion: javascript:(function(){var a = document.getElementsByTagName('body')[0];a.style.maxWidth=630+"px";a.style.margin="auto";a.style.padding="0 15px";})()