An icon is a small image 
that gives information about a topic in a graphical, easily understood way. You can assign an icon to multiple topics, and each topic can have more than one icon, but you may not repeat the same icon more than once on a single topic. You can add or remove icons on topics using the Home tab Map Markers group Icon Markers command, or from the Map Markers task pane.
Every map begins with a built-in Map Markers list : a set of available markers and their pre-defined meanings. The markers are stored in groups in the Map Markers list (displayed in the Map Markers task pane). When you add an icon marker to a topic you can select an icon from the current map markers list or choose a different icon from the Library.
You can choose a different pre-defined list of markers to use with the map in the Template Organizer's Map Marker Lists pane.
You can
modify the Map Markers list to assign different meanings, add or remove markers, and create new marker groups.
You can also use icons as criteria for
selecting topics and
filtering the map.
Select a topic or topics that you want to assign the icon to.
On the Home tab, in the Map Markers group, click Icon Markers.
In the icon marker picker select the icon you want to assign to the topic. Once an icon is added, you can rest your pointer over it to see its meaning. You can change its meaning in the Map Markers pane.
Some icons are mutually exclusive: Only one icon from that marker group can be added to a topic. If you attempt to add a second icon from the same group, it replaces the first icon. You can
change this attribute for a group. You can add multiple icons to a topic from a group that is non-exclusive.
If the icon you choose was already assigned to a selected topic, it is removed. This works as a toggle, so a second click on the icon will add it to all selected topics.
If you don't see the icon you want to add, click More Icons... to open the Library task pane. Click the icon in the Library task pane. The icon is automatically added to the General icons group in the Map Markers pane.
To display larger icons on the map, use MindManager's Visual Effects
option.
To see more detailed icons right-click inside the Library pane, and then click Show Large Previews.
To copy an icon from one topic to another, drag it to the new topic. Press CTRL to move instead of copy.
To add or remove a marker on a topic from the
Map Markers task pane, select the target topic(s), and then click the marker.
To add Priority icons use shortcut keys: CTRL+SHIFT+1 for Priority 1, CTRL+SHIFT+2 for Priority 2 etc.
CTRL+SHIFT+0 removes all Priorities from the topic.
To set shortcut keys for other icons in the
Library pane, right-click, then click Shortcut key in the context menu.
Once you have added an icon to a topic, you can change it in several ways:
For icons that belong to a named group, click the icon to cycle to the next icon in the group.
For icons that belong to a named group, right-click the icon, and then click a different marker from the displayed group.
Right-click the icon, then click Replace With to select an icon from a different group.
Right-click the icon, then click More Icons to replace the current icon with a new icon from the Library. The new icon gets added to the General icons group in the Map Markers pane.
Right-click the icon, then click Edit Map Marker Name to change the icon's meaning. This new meaning will show in the map legend.
To copy an icon, drag it to a new topic, then drop it.
To move the icon, press CTRL, drag the icon to a new topic, then drop it.
To remove an icon, right-click on the topic's icon, and then click Remove or Remove All Icon Markers to remove all the topic's icons.
CTRL+0 removes all icon markers; CTRL+SHIFT+0 removes all Priority icons.
If you prefer not to display icons but want to avoid removing them you can hide them using the
Show / Hide command in Map View. In Outline View you can turn off the icons column - right-click the column header and clear the Icons checkbox.
On a topic, right-click the icon you want to find.
Click Find Next or Find Previous to select the next or previous topic that uses this marker.
On a topic, right-click the icon you want to match.
Click Quick Filter, and then click Show topics with this marker or Hide topics with this marker.
Filtering is cumulative. Topics that are already hidden remain hidden when you apply a new filter.
To show all the topics again do one of the following:
Right-click the icon, click Quick filter, and then click Remove Filter.
On the View tab, in the Filter group, click Remove Filter.
On the Status Bar, click Remove Filter 
.
Right-click the map's workbook tab, then click Remove Filter.
To use additional criteria for filtering, use the Power Filter option.
