You can create a page layout by using a browser and SharePoint Designer. To create a page layout, you need to specify a page layout content type, which in turn, specifies which field controls (columns) you can place on your page layout.
SharePoint comes with a set of default content types, which SharePoint installs when you create a site collection (Collaboration Portal). Root level content types are used to create all the default lists, libraries, and page layouts. SharePoint Server comes with the following built-in page-layout content types:
Page Layout. Use this content type when you want to create your own page layout.
Article Page. This content type is based on the Page content type and is used to create the Article page ...