HP 38g Graphing Calculator - Manual (Page 78)

{{ZOOMI}
Options
Select an option and press {{OK}}.
Option Meanine
Center Recenters the plot around the current
position of the crosshairs without changing
the scale.
Box... Lets you draw a box to define the zoom
boundaries. Use the cursor keys to draw the
box, and press
{{OK}} to zoom in (see
below).
In Divides horizontal and vertical scales by the
X-factor and Y-factor (in Set Factors, below).
For instance, if zoom factors are 4, then
zooming in results in 1/4 as many units
depicted per pixel.
Out Multiplies horizontal and vertical scales by
the X-factor and Y-factor (in Set Factors,
below).
X-Zoom In Divides horizontal scale only, using X-factor.
X-Zoom Out Multiplies horizontal scale only, using X-
factor.
Y-Zoom In Divides vertical scale only, using Y-factor.
Y-Zoom Out Multiplies vertical scale only, using Y-factor.
Square Changes the vertical scale to match the
horizontal scale.
Set Factors... Sets the X-Zoom and Y-Zoom factors for
zooming (multiplying for Zoom Out,
dividing for Zoom In). Includes option to
recenter the plot before zooming.
Un-zoom Returns the display to the previous zoom.
3-14 Plotting and Exploring Functions