Before these documents are of much use, they must be transferred to some computer program, such as a word processor, where they can be better viewed and manipulated. After saving the book in this way you will see a new file on your computer which you can now open with your word processor. Once this is accomplished, the text can be manipulated using all the tools available on your computer. The print can be too small, or the lines too close together, or the font too elaborate. Help them by reformating the digital text for easier reading, either directly from the screen, or from a printout of the text.
Serifs are the little tails and hooks attached to the ends of letters.
These in fact are designed to help move the eye along while reading, but perhaps they're just getting in the way. Remember that fonts on a screen are sometimes different when printed. When studying a printed book, note taking has its problems. Teachers frown on writing in their books and even when this is OK, the margins are really much to small. But, if we write our notes on paper, they are decontextualized.