Page width

You could try putting something like this in your child theme’s style.css:

.page-template-default .entry-header,
.page-template-default .entry-content,
.page-template-default footer.entry-meta,
.page-template-default #comments-title {
     width: 100%;
}

.page-template-default #respond {
     width: 100%;
}

It didn’t work.
Looks like this:
/*
Theme Name: TwentyEleven
Description: Child theme for the Twenty Eleven
Author: Gustav
Template: twentyeleven
*/

@import url(“../twentyeleven/style.css”);

.page-template-default .entry-header,
.page-template-default .entry-content,
.page-template-default footer.entry-meta,
.page-template-default #comments-title {
width: 100%;
}

.page-template-default #respond {
width: 100%;
}

It looks like it worked to me? I guess I didn’t understand what you were trying to do. I thought you just wanted to make the page wider? Is that not what it did, or did I misunderstand?

Thats correct but nothing happend ??
I want only the forumpage to be more wider than the other pages so its not so narrow. If I take the “showcase template” the page look just like I want it (the width).

Here is a screenshot how it looks:
https://imageshack.us/f/838/screenhyf.png/