Below are several pages which can assist you in customizing the template you choose.
- Change the Banner instructs you on how to replace the banner at the top of the site, with another image of your choice.
- Delete or add a Page assists you in doing just that, as well as adding links to the horizontal navigation bar, found underneath your banner.
- Embedding Stuff instructs you on how to embed features such as images, videos, ads, a Facebook "like" button, and other gadgets.
- Using Flash-based Content explains the steps necessary to insert Flash content (like an interactive gallery) in your Google Site.