About Substitution Variables
Substitution variables act as global placeholders for information that changes regularly.
For example, you could set the current month member to the substitution variable
CurMnth
so that when the month changes, you need not update the
month value manually in the form or the report script. You create and assign values to
substitution variables within the application. These substitution variables are then
available in the application when you select members for a form.
Note:
If you migrated an application that uses Global variables, you can view, but not edit, them in the application.