Texas Instruments PLUS TI-89 - Manual (Page 33)

16 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 16 of 44
To move the cursor in a particular direction, press the appropriate
cursor key (A, B, C, or D).
Some TI -89 applications also let you press:
¦ 2 A or 2 B to move to the beginning or end of a line.
¦ 2 C or 2 D to move up or down one screen at a time.
¦ ¥ C or ¥ D to move to the top or bottom of a page.
¦ C and A, C and B, D and A, or D and B to move diagonally.
(Press the indicated cursor keys simultaneously.)
The TI-89 Keyboard
Use this section to familiarize yourself with the various keys on
the
TI - 89 keyboard. Most keys can perform two or more
functions, depending on whether you first press a modifier key.
Overview of Some
Important Keys
Moving the Cursor
N cancels a menu or
dialog box.
A , B , C , and D move
the cursor.
Adjust the contrast by
pressing
¥ | (lighten) or
¥ « (darken).
X, Y, and Z are often
used in symbolic
calculations.
2 , ¥ , ¤ , and j
modify the action of
other keys (page 18).
O lets you select an
application (page 38).
½ lets you select
from a list of functions
and instructions (page 44).
" displays the Home
screen, where you
perform most
calculations.
¸ e valuates an expression,
executes an instruction, selects a
menu item, etc.
You can use ¥ ¸ to display an
approximate numerical result.
3 lets you view and
change mode settings that
determine how numbers
and graphs are interpreted,
calculated, and displayed
(page 40).
ƒ through 2 Š
function keys let you
select toolbar menus.
Used with ¥ , you can
also select applications
(page 39).
M erases the entry
line. Also used to delete an
entry/answer pair in the
history area.