Education Technology

Solution 12169: Typing Lower Case and Upper Case Letters on the TI-89 Family, TI-92 Plus, and Voyage™ 200 Graphing Calculators.

How can I type lowercase and uppercase letters on the TI-89 family, TI-92 family, and Voyage 200 graphing calculators?

Refer to the table below for instructions on how to type in both lowercase and uppercase:



Press (TI-89 family):

Press (TI-92 family & Voyage 200):

Type a single lowercase alpha character

[ALPHA] and then the letter key

The letter key

Type a single uppercase alpha character

[Ý] (the thick, white up arrow key) and then the letter key

[Ý] and then the letter key

Type a space

[ALPHA] [_] (alpha function of the [(-)] key)


Turn on lowercase alpha-lock (TI-89 family)

[2nd] [a-lock]

(no action needed)

Turn on uppercase ALPHA-lock

[Ý] [a-lock]

[2nd] [CAPS]

Turn off alpha-lock

[ALPHA] (turns off upper- and lowercase lock)

[2nd] [CAPS] (turns off uppercase lock)


Please Note: On the TI-89 family, [ALPHA] or alpha-lock is not needed to type x, y, z, or t.  But [Ý] or uppercase ALPHA-lock must be used for X, Y, Z, or T.

Please Note: On the TI-89 family, alpha-lock is always turned off when you change applications, such as going from the Text Editor to the Home screen.

On the TI-89 family, while either type of alpha-lock is on:
• To type a period, comma, or other character that is the primary function of a key, alpha-lock must be turned off.
• To type a second function character such as [2nd] [{], alpha-lock does not need to be turned off.  After typing the character, alpha-lock remains on.

Please see the TI-89 family, TI-92 family, and Voyage 200 guidebooks for additional information.