When you are programming items, press 00 instead of subtotal like you normally would when changing the price. This will allow you to change the name instead. Then use the programming key layout diagram in the manual to enter the text. Press SUBTOTAL to finish and turn the key back.
------------------
If anyone is looking for a Sharp XE-A303 manual, try here:
http://the-checkout-tech.com/manuals/cashregisters/Sharp13.php
Registerman
October 2012