Use the following procedure to create global variables.
If you haven’t already done so, use the Field Definition window to define the global fields that will be used for global variables.
In the Resource Explorer, choose Globals in the Resources list.
Click New in the Resource Explorer or point to New in the Explorer menu and choose Global. The Field Lookup window will be displayed, listing all of the global fields. Select a field in the list and click OK. A global variable will be created based on the field you selected.