Microsoft Support: Insert and format field codes in Word - Format switch The codes for text fields (alphanumeric fields) can be found here: If you are formatting text fields, start your code with \*, for numeric fields start with \# and for date-time fields start with Formatting There are 3 different methods to format text.
Click with the mouse button on the field you would like to edit and add the formatting instructions (see below) at the end of the field (but before the closing curly brackets'}').
In the merged document, please select the merge field to be updated and then: You can update the fields that are used to merge the text and define the formatting in MS Word.