Generating mail merge report
Once you have a complete mail merge definition and template file, you can choose between different kinds of mail merge output. We recommend generating a print preview before you actually print or export your mail merge documents.
When previewing a report, in the Reporting dialog box, if Preview all documents as one file is set to No, the reports are displayed as individual documents. Conversely, if Preview all documents as one file is set to Yes, all reports are displayed in a single document.