1. Open the Parameters form by going to Tools > Edit Parameters & Criteria.
2. Select the parameter group to add a parameter to and press the Add button. This will prompt the user to enter a name for the parameter.
3. Select the new parameter from the list and fill in the details as appropriate, by either typing or selecting from the drop down list box. Also, any alternate spellings can be added at this time.
4. Press Refresh. The new parameter will be added.
Note: If the criteria group, criteria sub-group or parameter group is not listed, these can be added by activating the Group Management tools through pressing the Edit Groups button (see the section Guideline/ Parameter Group Management).