To edit a node right click on it, and select Edit Node.



To edit the data in a node select the Data tab.



To edit the operation of a node select the drop down box.  All possible states will be listed for selection.


To edit the distribution of a given node select the Distribution tab.  Note that only goal nodes can have a distribution so most nodes will have this area grayed out.



Here's the Distribution tab of a goal node.



To edit the description select the Description tab.  Here you can enter the nodes full name as well as a description of what the node represents.