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TI-83 Plus Function Graphing 139
Zoom Cursor
When you select
1:ZBox
,
2:Zoom In
, or
3:Zoom Out
, the cursor on the
graph becomes the zoom cursor (
+
), a smaller version of the free-moving
cursor (
+
).
ZBox
To define a new viewing window using
ZBox
, follow these steps.
1. Select
1:ZBox
from the
ZOOM
menu. The zoom cursor is displayed at
the center of the screen.
2. Move the zoom cursor to any spot you want to define as a corner of
the box, and then press
Í
. When you move the cursor away from
the first defined corner, a small, square dot indicates the spot.
3. Press
|
,
}
,
~
, or
†
. As you move the cursor, the sides of the box
lengthen or shorten proportionately on the screen.
Note: To cancel
ZBox
before you press
Í
, press
‘
.
4. When you have defined the box, press
Í
to replot the graph.