When editing a community page, several actions are available to you:
Add Portlets. This allows you to add pre-configured portlets to the page.
Create Portlets. This allows you to create new portlets for your community. These new portlets will not be available outside of the community unless an administrator moves them to a folder where other community managers have access to them.
Add Content Canvas. This allows you to add a content canvas (a page section that spans multiple columns) if your page template supports it.
Select Page Layout. This allows you to select your page layout. If the page you are editing is from a page template that dictates the layout, this option is not available.
Using a combination of these actions, you can configure your page within the bounds of the page template you are working from. The page you configure will inherit the header and footer of the community that the page is part of.
To display the page associated with this help topic:
To edit an existing community from within the community:

On the right, click
Edit This Community.
Under Community Pages, click a page.
To edit an existing community from Administration:

Under Community Pages, click a page.
To create a new community:

Under Community Pages, click a page.