Text Control Reporting User's Guide > Reporting Concepts
IncludeText fields contain a reference to external documents that are included during the mail merge process.
This allows the separate storage of specific sub-templates in order to reuse them in other templates. The field refers to the name of a sub-template that must exist in the path given by the SearchPath property.
In order to insert an IncludeText field, choose IncludeText from the Insert Special Field drop-box box of the Reports tab. Type in the name of the sub-template and confirm with OK.