Setting a custom Master Page in a Team site

Natively, SharePoint uses v4.master for Team sites and does not give you the option to choose a different master page.  To enable master page selection, you need Publishing enabled.  Follow the steps below to enable publishing features (in this order).

• Site Actions > Site Settings > Site Collection Features (under Site Collection Administration)
  • Activate SharePoint Server Publishing Infrastructure
• Site Actions > Site Settings > Manage Site Features (under Site Actions)
  • Activate SharePoint Server Publishing

The SharePoint Server Publishing feature is dependent on the site collection’s publishing infrastructure.  If you do not have access to the Site Collection Features, still try activating the site feature.  SharePoint will warn you if the site collection feature is not enabled.