Welcome to MobileRead, rayh
This information is also in section 2.2 of the "Kindle Users Guide" already downloaded to your K3's.
Here is a link to view it on your computer.....
http://kindle.s3.amazonaws.com/Kindl...de_English.pdf
This page has lots of great information also.
http://www.amazon.com/gp/help/custom...deId=200127470