The MapMessage input mode is only available in a Messaging Client tool  when JMS is selected as the Transport type, and javax.jms.MapMessage is chosen as the Message-Type.

The MapMessage input mode has Name, Type, and Value columns for configuring the messages.

• Click Add and specify message values.  
• Click Modify to change messages.
• Click Remove to delete a message from the tool.

MapMessages can also be Diffed by right-clicking the Messaging Client node and selecting Create Regression Controls from the shortcut menu.