Every filter@ merge field will cause the letter generator to pause at runtime and prompt the user to select one or more choices from a list. The mapping determines what values that list will contain.
Before mapping filter@ merge fields, make sure that you properly set up the merge fields that are nested within your two filter@ merge fields in the RTF, as described in filter@ Merge Fields for User-selected Related or Sub-objects.
There are two steps to mapping related or sub-objects to be selected by the user:
•Mapping filter@ Merge Field to a Related or Sub-object
•Mapping Merge Fields Nested within filter@
The Merge Field drop-down list will not display the basic merge fields that are nested in your filter@ merge fields in until you map your filter@ merge field to a related object or sub-object.