[Larla]

To me the most useful information to display would be screen page numbers. They should be shown at the bottom of every page and should be of the form: page x of y.

Sure they change if you change the font or spacing. So what? The computer can instantly calculate what the new current screen page # and total number of screen pages are if there is some format change.

This approach has the advantage of telling you exactly where you are in the current e-book you are reading. It also tells you how many "next screens" you will have to hit before you are finished.

It is not clear how useful an actual print page # would be. For one thing, the total # of pages vary depending on whether it is hardback or paperback.

To be fair, the one drawback I see with screen page #'s is that they would not be as useful in referring to a part of a book to another person. However, my main use of page #'s is to tell me where I am in the book I am reading.