Hi Mon3,

Just from the top of head, try to look in the general....styles.css file in packages/theme_package_name/theme_folder/"the css file stated" if you have access to your site's folders and files.

or;

if you've overwrite the theme for development purposes (ideal) it's in the path_to_domain/themes/theme_name/...general...styles.css file in your theme folder.

Open that file and find #container{...[codes]..., width:740px; ...[codes]...} and replace the width to your desired selection size.

But keep in mind you might also have to work around with other elements especially the "body" elements (in the same file) as it's holding some height and width for centering the #container above for your webpage.

Hope it helps.
Irsah.

...thanks now I try!

OK, sure, hope it helps out.

...sorry irsah but i I can't find the site's folders and files, where is it? :(

You need to login to your host account, download the files via ftp, make your edits and upload them again.

Most probably your will see a folder named 'public_html' when you log in. That is your root web folder. Look for your theme in 'public_html/packages'.

Have you found files? Adajad has pointed it out clearly.

Do you have a link so people can point you to the right direction paths.

Irsah.