Let's assume your client has a few special pages on the site about a special event. They want to make this event page stand out from the rest of the site. To create this effect, we'll create and apply a template style. We'll create a copy of a template and use it to style only the pages that are linked through one specific menu link. This can be done as follows:
First, we'll make a dummy page and a menu link that points to it. In this example, we'll create an article page named Visit the Bad Art Event and a Main Menu link of the Single Article type, which is named Bad Art Event.
Go to Extensions | Template Manager to access the Template Manager: Styles screen.
We'll use the Protostar template and create a copy of it. Select protostar - Default by ticking the select box to the left-hand side of the template name. Then, click on the Duplicate button. This is shown in the following screenshot:
A copy of the template appears in the...