Page numbering page). Even numbers usually appear on verso pages, while odd numbers appear on recto pages. In the printing industry, in cases where odd numbers appear on verso pages and even numbers on recto pages, this is referred to as "non-traditional folios" (in the past, it had been referred to as "Chinese folios", however this term has fallen out of favor in recent years). In books, some pages, known as "blind folios", of the front matter and back matter are numbered, but the numbers are not always printed on the pages. Publishers are not consistent about how they number the pages
Page numbering way as their printed counterparts. While reading devices for reflowable documents such as EPUB e-books may display page numbers, these numbers change from device to device depending on factors such as the size of the display and the selected font size. This makes them unsuitable for citation purposes. To remedy this problem, Amazon Kindle e-books contain what are called "location numbers", that is, numbers in the margin of the electronic text that indicate where the corresponding page begins in the printed version of the book. In codicology, each physical sheet ("folium", abbreviated "fol." or "f.") of a manuscript is numbered,