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The <code><region></code> tag defines a [[screen layout]] where individual media items can be assigned to play. Media objects can then be assigned to each defined region.

<source lang="smil">
<smil>
  <head>

    <layout>
      <root-layout width="1280" height="720" />
      <region regionName="video" top="0" left="0" width="720" height="480" z-index="1" />
      <region regionName="ticker" top="480" left="0" width="1280" height="240" z-index="1" />
      <region regionName="slideshow" top="0" left="720" width="560" height="480" z-index="1" />
      <region regionName="overlay" top="50" left="50" width="100" height="100" z-index="2" />
    </layout>

  </head>
  <body>

    <par>
      <video src="ad1.mpg" region="video" />
      <smilText textMode="crawl" region="ticker">Hello, world!</smilText>
      <img src="ad2.jpg" region="slideshow" />
      <img src="logo.png" mediaOpacity="50%" region="overlay" />
    </par>

  </body>
</smil>
</source>

The <code><head></code> section defines a typical 3-zone digital signage application with a zone for 720x480 video, a slide show zone, and a ticker zone. Overlaying the video zone is an overlay layer which allows the user to place a logo or a dynamic message on-top of the running video.

The <code><body></code> section contains contents to play in parallel in all four regions defined. 

== Related ==
SMIL topics:
* [[SMIL Media Objects]]: video, image, smilText, and audio objects
* [[SMIL Playlists]]: seq, par, and excl playlists
* [[Transport|Sending SMIL to Player]]

Layout topics:
* Defining [[screen layout]]