Font color is useful for emphasis, and for grouping topics. It can be used casually, or given a specific meaning in the Map Markers list. Font color is color is applied from the Formatting group on the Home tab or Format tab.
Select the topic(s) you want to color.
On the Home tab or Format tab, in the Formatting group, do one of the following:
Click
Font Color 
to apply the
selected color
Click the Font Color arrow, then click the color in the color picker dialog. The Font Color Markers list shows in the bottom of the picker. If you select a different color, it will be added to the Font Colors group in the Map Markers pane, where you can add a meaning for it (i.e. My tasks).
If you do not assign a meaning to the color, it will disappear from the Map Markers list if it is no longer used on the map.
If you assign a meaning to the color in the Map Markers pane, it will appear in the map legend. It will remain in the list of map markers even if it is not used on the map. You can change the marker's color and meaning using commands in the Map Markers list.
You can use font color markers as criteria for selecting topics and filtering the map.
You can add a marker to the selected topic(s) by clicking it in the Map Markers Pane.
