The Ti.89 Keyboard - Texas Instruments TI-89 Manual Book

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