change width of the forum and portal at same time?
You change it in the css for each theme, and the portal and forum are the same.
Each theme 'should' have something like <div id="global-wrapper"> after the <body> in each overall_header.tpl -
So in the CSS you would need to find
#global-wrapper and change the width. If some themes don't have global wrappers (Or they may actually be called something else) - Then you will have to add them.
Also:
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