HP 39g+ - Manual (Page 52)

2-12 Aplets and their views
To box zoom The Box Zoom option lets you draw a box around the area you
want to zoom in on by selecting the endpoints of one diagonal
of the zoom rectangle.
1. If necessary, press H@IV• to turn on the menu-key labels.
2. Press aPPH• and select 7PY• .
3. Position the cursor on one corner of the rectangle. Press
PF• .
4. Use the cursor keys
(
*e,, etc.) to drag to the
opposite corner.
5. Press PF• to zoom in on
the boxed area.
To set zoom
factors 1. In the Plot view, press H@IV• .
2. Press ÃaPPH• .
3. Select Set Factors... and press PF• .
4. Enter the zoom factors. There is one zoom factor for the
horizontal scale ( XZOOM ) and one for the vertical scale
( YZOOM ).
Zooming out multiplies the scale by the factor, so that a
greater scale distance appears on the screen. Zooming in
divides the scale by the factor, so that a shorter scale
distance appears on the screen.