HP 48gII - Manual (Page 431)

Page 12-50
BOXZ
Zooming in and out of a given graph can be performed by using the soft-
menu key BOXZ. With BOXZ you select the rectangular sector (the “box”)
that you want to zoom in into. Move the cursor to one of the corners of the
box (using the arrow keys), and press
@)ZOOM @BOXZ. Using the arrow keys once
more, move the cursor to the opposite corner of the desired zoom box. The
cursor will trace the zoom box in the screen. When desired zoom box is
selected, press
@ZOOM. The calculator will zoom in the contents of the zoom
box that you selected to fill the entire screen.
If you now press
@ZOUT, the calculator will zoom out of the current box using
the H- and V-Factors, which may not recover the graph view from which you
started the zoom box operation.
ZDFLT, ZAUTO
Pressing @ZDFLT re-draws the current plot using the default x- and y-ranges, i.e.,
-6.5 to 6.5 in x, and –3.1 to 3.1 in y. The command @ZAUTO, on the other
hand, creates a zoom window using the current independent variable (x)
range, but adjusting the dependent variable (y) range to fit the curve (as when
you use the function
@AUTO in the PLOT WINDOW input form („ò,
simultaneously in RPN mode).
HZIN, HZOUT, VZIN and VZOUT
These functions zoom in and out the graphics screen in the horizontal or
vertical direction according to the current H- and V-Factors.
CNTR
Zooms in with the center of the zoom window in the current cursor location.
The zooming factors used are the current H- and V-Factors.
ZDECI
Zooms the graph so as to round off the limits of the x-interval to a decimal
value.