We need more information. Link to your site with the page you are referring to? What new width are you trying to set it to. Otherwise all we can tell you is set the width on the <body> or <htmL> elements. We would only be guessing
Oops: I see you did leave a link
You changed <body> width to 70%, I see. Post your changed CSS and what you are trying to accomplish. Are you trying to create a fixed width?
I think this is what you are looking for. Add max-width to additional.css file. Change back that stylevar to auto.
Code:
body {
color: #3E3E3E;
font-size: 13px;
line-height: 1.23;
margin: 0 35px;
min-width: 650px;
max-width: 1024px; /* This is probably what you are are looking for :) *
width: auto;
}
/* additional css */
body { max-width: 1024 px } /* What ever size you want */
Hope it helps