Brother P-TOUCH 3.1 - Manual (Page 187)

Data:
This displays the contents of the joined field. To add additional text to the joined field, type it in at the
desired position. To divide the joined field so that it appears on different lines in the layout, type in
"\n" at the point where you want to end the line and start a new one.
Fields:
Select the fields that you wish to include in the joined field.