If the element supports an author-defined ID, use the id parameter for the element as follows:
<element id=id> ...
The elements (within a topic) that support an ID attribute are:
Or, use the <location> element to set an ID at an arbitrary point within the topic as follows:
<location id=id> text <\location>
Where text is any word or phrase where you want to add an ID. The <\location> end tag is required. When you activate a link to a location ID, the Help Viewer displays the topic containing the ID and scrolls the window to the ID position.