HP 48gII hp 48gII_user's manual_English_E_HDPMSG48E67_V2.pdf - Page 430
Zooming in and out in the graphics display, ZFACT, ZIN, ZOUT, and ZLAST
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Zooming in and out in the graphics display Whenever you produce a two-dimensional FUNCTION graphic interactively, the first soft-menu key, labeled @)ZOOM, lets you access functions that can be used to zoom in and out in the current graphics display. The ZOOM menu includes the following functions (press Lto move to the next menu): We present each of these functions following. You just need to produce a graph as indicated in Chapter 12, or with one of the programs listed earlier in this Chapter. ZFACT, ZIN, ZOUT, and ZLAST Pressing @)ZFACT produces an input screen that allows you to change the current X- and Y-Factors. The X- and Y-Factors relate the horizontal and vertical userdefined unit ranges to their corresponding pixel ranges. Change the HFactor to read 8., and press @@@OK@@@, then change the V-Factor to read 2., and press @@@OK@@. Check off the option Recenter on cursor, and press @@@OK@@. Back in the graphics display, press @@ZIN@ . The graphic is re-drawn with the new vertical and horizontal scale factors, centered at the position where the cursor was located, while maintaining the original PICT size (i.e., the original number of pixels in both directions). Using the arrow keys, scroll horizontally or vertically as far as you can of the zoomed-in graph. To zoom out, subjected to the H- and V-Factors set with ZFACT, press @)ZOOM @ZOUT. The resulting graph will provide more detail than the zoomed-in graph. You can always return to the very last zoom window by using @ZLAST. Page 12-49
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