You can open a custom defined template from the System View or from the Rule Designer by double clicking it in a business rule's flow chart.
To open a custom defined template:
In the System View, expand the Financial Management, Planning, or Essbase application type, the application, the calculation type (for Financial Management), the plan type (for Planning), or the database (for Essbase), and Templates.
Right-click the custom defined template you want to open, and select Open.