The .prefix page command turns on the prefix page numbering mode, which starts numbering each chapter at page 1.
.prefix page
.pp
The current chapter number is used as a prefix for the page number. For example, the fourth page of the third chapter prints as 3-4.
The command .xprefix page turns off .prefix page.
.prefix page .chapter 1 .footing "page ’p’" This is page one of chapter 1. .bp 2nd page of chapter 1. .chapter 2 1st page of chapter 2. .bp 2nd page chapter 2.