Textbooks require displaying page numbers to tell the readers where they are on the book. To enable page numbering:
Check the checkbox on page dropdown as shown below:
If you’re using Bookiza, set the has_page_numbers property on .bookrc to true, like so:
$ vi .bookrc // In your project root.
{
"mode": {
"HTML": "haml",
"CSS": "scss",
"JS": "js",
"HEAD": "html"
},
"name": "My next great textbook!",
"type": "text",
"has_page_numbers": true
}