Originally posted May 2, 2010 by Cindy O'Neal
While you have your book opened...
Text Size
To change the size of the text, press the Aa key on your Kindle keyboard. This is the first key to the right of the space bar on the bottom row. Use your 5-way switch to toggle to the size text you want. As each text size is underlined, you will have a live view of how it will look with your book.
Change line spacing
You can make your books easier to read without changing the text size on your Kindle.
Press Shift (the up arrow - bottom row far left) + the Alt key. Then while holding those two keys down, press a number from 1 to 9 and you will see the line spacing change on your Kindle book. Sometimes you don't really need a larger text size, changing the line spacing is just the thing.
