If you want to change the width of the right column in the JA Orisite template, you’ll need to adjust the colwidth value of the middle column in the default layout file. The right column will adjust to fill the space.
I got the following in a support ticket reply from Leo:
——-
1. Right column width:
On your administrator, go to Extension >> Template Manager >> Current template style >> Layouts tab >> Open “Edit default” layout name.
Then find: <blocks name=”middle” colwidth=”25″ main-inner=”1″> , you can modify colwidth property.
2. Main content.
On your server, open templatesja_orisitecsstemplate.css. Then find this line: .ja-content-main. You can modify main content’s width here.
——-
You’ll also need to adjust the widths of the various module header background png files, e.g., if you make the right column wider, the art must be wider or they won’t span the full width of the new right column modules.