Survey on Electronic Book Features  

While people may not want a radical departure from the paper book, they want to do things with electronic books that are not possible with paper books. For example, they want to 'personalize' their electronic book reading experience by changing the fonts, typefaces, and margins, moving illustrations and tables around the page, sizing images differently than text, and so on. In effect, people want to manage the presentation of information within the electronic book. This raises an issue because not only do people want to manage presentation, they want to add content to electronic books they purchased. For example, they may read a related article and want to add that content to the book. Adding content should not be viewed as simply creating an annotation or note but adding content that becomes part of the book and incorporated into the table of contents and index.

Henke, Harold. OeB (2002). Articles>Publishing>Online>eBooks