If you want to customize the look of your Zune HD, you can change the background to any pre-synced pictures on your Zune. To do this, follow this Tech-Recipe.
1. Select pictures.
2. Locate the desired image that is to become the Zune background. The image will either be in the root or in a folder.
3. You can apply the image as the background one of two ways:
a. When viewing the thumbnails, press and hold the thumbnail of the desired image. Select APPLY AS BACKGROUND from the resulting menu.
b. When viewing the image itself, press and release the image and select APPLY AS BACKGROUND from the bottom of the screen.
4. Background changed will appear at the bottom of the screen.