Place a subreport within the body of a report to detail the records in a pipeline other than the primary one where that pipeline may have more than one record.
For example, if the primary pipeline has people in it, and you want to show every phone number for that person, add a subreport. Set the pipeline to that subreport to "Phone numbers". (You'll see a tab at the bottom of the designer with that pipeline's name.) Within that subreport, put the "Phone number" and "Kind" fields, setting each to the "Phone numbers" pipeline. When each person prints, the subreport will print once for every phone number that the person has, including the fields you placed on it.