Page Layout, Fixed

Most fundamentally, there are two kinds of ebook formats—those that use a fixed page layout and those that use a fluid page layout. PDF is the classic example of a fixed page layout. No matter which device you read a PDF on, the text, images, and all of the other parts of the page will always look the same. The fonts will never change, and the page numbers are eternal. Traditional publishing tools such as InDesign, FrameMaker, and Quark excel at providing content creators with a means to produce fixed page layouts. These tools output PDF, which in turn can be sold as an ebook or printed as a traditional book.