In this dialog parameters may be defined, which can be
read from in a later stage of the process. You can for example define an individual session variable of the type
session value with an individual variable name for the target (e.g. mySessionVariable)
in the following dialog and then use it in a groovy condition:
if (g_sharedState.mySessionValue == "red")
stop()
else
go()
Click on Add parameter here.
The properties of parameters can be changed with Edit. Delete
removes a defined parameter from the list.
Add parameter here.
Edit. 
Delete
removes a defined parameter from the list.