Using images in your watch face can really help bring it to life, from a
full-screen background image to individual detail images to add interest.

Place your image resources in the `res/drawable` folder, for example
`res/drawable/face.png`, and then reference the image as follows:  

    <PartImage x="100" y="100" width="250" height="250">
      <Image resource="face"/>
    </PartImage>

The `PartImage` element, as with other containers in Watch Face Format,
can be modified in
many ways, including being scaled, rotated, transformed, tinted, or masked.
See the [`PartImage`](https://developer.android.com/training/wearables/wff/group/part/image/part-image) reference for more information.

### Vary the background

One effect that can provide interest is to change the background every hour.
This can be achieved through the use of the `Images` element, for example:  

    <PartImage ...>
      <Images change="ON_NEXT_HOUR">
        <Image resource="background1"/>
        <Image resource="background2"/>
        ...
      </Images>
    </PartImage>