You can create and use a Process Flow Variable throughout the execution of a process flow. To create a process flow variable:

Open Process Designer.
Click the Process Flow Variables tab in the bottom pane.
Click in the Process Flow Variables Panel.
On the Process flow variable entry, type the name and value of the process flow variable in the Variable name and Variable value.
Click Ok.
Once a new process flow variable is created, it is added to the list in the Process Flow Variables tab.

Click Track check box to track all changes made to the Process Flow variable.

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