# Chapter 4:   Pages

## 4.1   Physical pages versus TeX pages

Every time TeX writes a page to a dvi file it inserts codes indicating the beginning (`BOP`) and end (`EOP`) of the page. The number of physical pages is thus the number of `BOP`'s in the dvi file.

At the start of each physical page, TeX records additional information indicating what page number will appear when the dvi file is printed. (More precisely, it stores the contents of the first ten `\count` registers, the first of which is usually the register used to store the page number printed at the bottom of the page.) This page number is the TeX page.

Thus, it is possible to have a dvi file that when printed consists of 10 physical pieces of papers where each page has the number '1' printed at the bottom of the page.

For example, the file `test.dvi` consists of 6 physical pages, with TeX page numbers 1, 2, 3, 4, -1, -3.
```dvii -p test
p:[1/1]
p:[2/2]
p:[3/3]
p:[4/4]
p:[5/-1]
p:[6/-3]
```
The first number in the bracket is the physical page while the second is the TeX page.

If you want to suppress the display of physical pages, use the `-P` option (see section 3.13).