[sirbruce]

New things from the manual:

Your Choice of Number of Words per Line
You can also change the number of words per line in the book or periodical
you are currently reading. Press the Text key , move the 5-way controller to
choose the number of words per line you prefer and press the 5-way to select. This
changes the width of the margins. You may find you read faster with fewer words per
line. Experiment to see what works best for you.

Note - You cannot change the number of words per line in PDF files or in Basic Web.

Adjust Screen Rotation
The Kindle DX screen image can also auto-rotate to match the way you are holding
your Kindle so you can see the entire width of a web page or magnify the page of a
PDF file. The screen changes automatically when you rotate your Kindle from portrait
to landscape or vice versa. Or, you can lock your screen to a particular orientation to
fit your reading position. Press the Text key , then move the 5-way controller to
select the screen rotation you want. Press the 5-way to select.

Also, the next page and previous page buttons are *only* on the right side!

Tip: Want the Next and Prev Page buttons on the left? Simply rotate the device 180
degrees so that the buttons are on the left side.

3.6 Reading PDF files
Your Kindle DX is able to display most PDF documents.

When your Kindle is held in portrait orientation, PDF documents are displayed in
their original layout and fit the entire screen of the device. White margins of PDF
documents are automatically cropped to maximize the amount of content shown
on the screen.

In landscape orientation, Kindle automatically magnifies your document to fit the
width of the screen to improve readability.

A black outline defines the limit of the page of the PDF document.

In both portrait and landscape orientations, the bottom of the screen shows how far
you have read in a particular item as a percentage, and displays the current page
number, as well as the total number of pages of the current document.