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 appears in lowercase if you write it in the lowercase letter area (abc) of the input panel.
Lowercase Area of the Input Panel
Uppercase Area 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.