A. Modifiers (2nd, diamond, alpha, shift)
Look at the keypad for the TI-89, and you will see that each key has more than one application associated with it. Some of these are printed in yellow, and some are printed in blue. To access these applications, you will use the four modifier keys. These keys are also used to activate shortcuts.
1. 2nd Key . When you press this key, the second function of the key you press next will be accessed. These functions are printed in the same color.
Example: When you press and then , you are accessing the QUIT function.
2. Diamond Key . When you press this key, you will activate certain applications, menu items, and other operations that are on the keyboard. These are printed in the same color.
Example: When you press and then , you have accessed the inverse tangent function.
3. alpha Key . This key is used when you need type alphabetic letters or a space. They are printed in the same color (purple) as the key. When you press the key, the letters typed will be in lower case.
4. Shift Key . Use this key to type uppercase letters.