<?xml version="1.0" encoding="UTF-8"?>
<impress numbered="yes|no">
<increment x="1000" y="1000" angle="45" length="4" />
<!--
Where:
'x' is the horizontal distance between slides
'y' is the vertical distance between slides
'angle' is the angle between two slides
'lenth' is the loop length
-->
<title>
<!--The title of the document-->
</title>
<style>
<!--Specify style options as in CSS-->
 .step {
	width: 1000px;
}
<!--at least slide width must be specified-->
</style>
<step>
<!--xhtml code for the first slide-->
</step>
<step>
<!--xhtml code for the second slide-->
</step>
<step>
<!--xhtml code for the third slide-->
</step>
...
</impress>