5 Page Layout Let’s say you are creating an eBook. Remember it's an ebook, not a book. Do not use the layout optimized for books if you know the document will be consumed on a screen. • Avoid columns, especially in a document with a long-form vertical layout. The reader is forced to scroll down and then up and down again in order to read the same page. • Do not make extremely long or wide pages/slides. We recommend not making it longer than A4 paper or wider than 16:9 ratio • Single page cropped (no double spreads). Remove all crop marks.