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The default scale is displayed in the PLOT
SETUP view shown right. It may seem a
strange choice for axes but it reflects the
physical properties of the LCD screen, which is
131 pixels wide by 63 pixels tall. A 'pixel' is a
'picture element' and means a dot on the
screen. The default scale means that each dot
represents a 'jump' in the scale of 0.1 when
tracing graphs. The y value is determined by the graph, of course, and has
nothing to do with your choice of scale. Once the scale changes, the cursor
jumps from dot to dot are often not a useful size. See page 69 for
information on choosing 'nice' scales.
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The MENU toggle
If you look at the screen key
list at the bottom of the screen
you will see only a single entry,
labeled
.
Press the key under it and your screen will
change to look like the one above right.
Press it again and the screen will clear
completely. Once more and you are back to the
original appearance. Try pressing it a few times
to get the feel for its behavior. This is what is
known as a 'toggle' switch. The
triple toggle, cycling through each of the display
modes shown right. The first default mode is (X,Y) mode, which displays the
coordinates of the current cursor position. In any of these modes the up/down
arrows move the cursor from function to function, while the left/right arrows
move along the currently selected function.
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Calculator Tip
Pressing SHIFT right arrow or SHIFT left arrow will jump
the cursor directly to the right or left side of the screen.
key is a
57
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