Try to avoid any large blank spots on paper, and make sure you don't have tiny, hard - to - read font in order to fit in all of your information. (advice.j2c.com)
If I may ask you a question, in portrait mode for reading comic books can you still read the fonts? (goodereader.com)
It's also a good idea to keep the paragraph font a simple, easy to read font since this will be the majority of the reading material in your eBook. (artfulpublications.com)