What do you mean by the resolution??
That's a theme

I personally haven't seen this one released anywhere, but try looking
here and
here.
Unless you mean the width of it... not being too clear... if you mean width, you can edit the width value in the #container section of global.css of your theme, or the table width in your index template.
OK you have right I mean the width haha... i'm sorry but i'm new in this forum

where i change the width of the forum?
Ok, do you want to change the witdh of
just the forums, like this:
[
attachment=11613]
Or the
entire page, like this:
[
attachment=11614]
I'll explain either way when you choose

That make it a bit easier then

Ok, here's what to do. ACP > Templates & Style > **click theme name** > global.css > Edit Stylesheet: Advanced Mode > and then at about line 27, you should see a block of code titled #container. Find the 'width:' line, and change that to 70%, and click save. You can change this value if you don't like 70%, that was just an example.