Texas Instruments PLUS TI-89 - Manual (Page 39)

22 Chapter 2: Operating the Calculator
02OPER.DOC TI-89/TI-92 Plus: Operating the TI-89/TI-92 Plus (English) Susan Gullord Revised: 02/23/01 1:06 PM Printed: 02/23/01 2:11 PM Page 22 of 44
On the TI -89 , while either type of alpha-lock is on:
¦ To type a period, comma, or other character that is the primary
function of a key, you must turn alpha-lock off.
¦ To type a second function character such as 2 [, you do not
need to turn alpha-lock off. After you type the character, alpha-
lock remains on.
There are certain times when you do not need to press j or
2 ™ to type alphabetic characters on the
TI -89 . Automatic
alpha-lock is turned on whenever a dialog box is first displayed. The
automatic alpha-lock feature applies to these dialog boxes:
Dialog box Alpha-lock
Catalog dialog box All commands are listed in alphabetical
order. Press a letter to go to the first
command that begins with that letter. See
page 44 for more information.
Units dialog box In each unit category, type the first letter of a
unit or constant. See Chapter 4 for more
information.
Dialog boxes with entry
fields These include, but are not limited to: Create
New Folder , Rename , and Save Copy As . See
page 35 for more information about dialog
boxes.
Alpha-lock is not turned on in dialog boxes that require numeric-
only entries. The dialog boxes that accept only numeric entries are:
Resize Matrix , Zoom Factors , and Table Setup .
Use the 2 ¿ menu to select from a variety of special
characters. For more information, refer to “Entering Special
Characters” in Chapter 18.
Typing Alphabetic
Characters …
(continued)
Automatic Alpha-
Lock in TI-89 Dialog
Boxes
Note: To type a number,
press
j to turn alpha-
lock off. Press j or
2 ™ to resume typing
letters.
For Special
Characters