Front-matter pages are traditionally numbered in lower-case Roman numerals (i, ii, iii, iv, v, etc.), which prevents renumbering the remainder of a book when front-matter content is added at the last moment, such as a dedication page or additional acknowledgments. Page number is omitted on blank pages and display pages (i.e., such stand-alone pages as those for the half title, frontispiece, title page, colophon, dedication, and epigraph), and it is either omitted or a drop folio is used on the opening page of each section of the front matter (e.g., table of contents, foreword, preface).[3] Front matter generally appears only in the first of a multi-volume work, although some elements (such as a table of contents or index) may appear in each volume.