HP 430se - Manual (Page 116)

110 Hewlett-Packard Jornada 430/430se Palm-size PC
Areas of the Input Panel Areas of the Input Panel Areas of the Input Panel Areas of the Input Panel
You can write letters in either uppercase or lowercase. How the
letter is interpreted and displayed depends on where you write it
in the input panel. For example, you can write a letter in
lowercase or uppercase, and it will appear in lowercase if you
write it in the lowercase letter area (abc) of the input panel.
You can also write punctuation and editing marks, and add or
delete space in the letter areas (abc and ABC) of the input
panel. For example, draw a horizontal line from left to right to
add space, and from right to left to backspace. See the tables at
the end of this appendix for details.
You can write numbers in the number area (123) of the panel.