On
the Status Bar, click the Task Panes button 
, then click Map
Markers.
On the Home tab, in the Map Markers group, click the Map Markers dialog launcher to open the Map Markers task pane.
The legend displays the map marker list groups, and all the named markers within those groups. The legend is added as a subtopic of the currently selected topic, or as a main topic if no topic is selected.
Select the topic to attach the legend to.
The legend is added as a new main topic or subtopic by default, but you can detach it to make it a floating topic.
Do one of the following:
On
the Status Bar, click the Task Panes button , then click Map
Markers.
On the Home tab, in the Map Markers group, click the Map Markers dialog launcher to open the Map Markers task pane.
Under Organize, click Insert legend into map.
Choose whether to show all markers in the legend, or only those that are used on the map.
A new set of topics will be added to the map showing the map marker groups and meanings. Markers in the General icons group will not appear in the legend. If you want to include these markers in the legend you must name them (general markers will move into the Single Icons group when you name them).
The legend is not automatically updated, so if you rearrange the markers in the list or rename the groups the legend will not be current . To get a current legend, delete the existing legend topic and then add the legend again from the Map Markers pane.
