<para>
This option specifies the icon or waypoint type to write for each waypoint on
output.
</para>
<para>
If this option is specified, its value will be used for all waypoints, not
just those that do not already have descriptions.  That is, this option
overrides any icon description that might be in the input file.
</para>
<!--
Eventually link to a table of valid icons...
-->
<para>
This option has no effect on input.
</para>
