Is it easy

I ahve a site that doesnt fit to webpage, its too thin where or how to edit so its wide as browser ...thanks

 

use div class {width:100%}

 

Where to do this in css? not sure thanks

 

Do it for every element that you want wider.
e.g.
#header, #content, #footer {
width: 100%;
}
will make the elements with the ids header, content, and footer the width of the browser.

Put this at the start of the CSS file.

 

in source find: <div class="main body" or <div id="main body" or something pertaining to this for your webpage's main text area.
if it's hook is id in the css file look for
#div main body {
//css syntax
}

or if it's a class:

.div main body {
//css syntax
}