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It is worth familiarizing yourself with the mathematical functions available on
the keyboard. If we examine them row by row, you will see that they tend to
fall into two categories - those which are specific to the use of aplets, and
those which are commonly used in mathematical calculations.
The screen keys
The first row of blank keys are context defined. The
reason they have no label is that their meaning is
redefined in different situations - they are the
'screen keys'. The current meaning of each key is
listed in the row of boxes at the bottom of the
screen.
A common abbreviation used for these keys is SK1
or SK2 etc (for "screen key 1" ). In the PLOT view
shown above, some of the screen keys are labeled,
such as the
appear or disappear. To see another view where all the keys are in use,
change to the APLET view.
Aplet related keys
The next two rows of keys and part of the
third are mainly aplet related, so we'll deal
with them as a group.
The arrow keys
The arrow keys on the right are used in
most views, usually to move the cursor (a
small cross) or the highlight around on the
screen.
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key. When you press this the row of screen keys labels
Calculator Tip
Develop the habit of checking the screen to see if any of
those keys have been given meanings. In many views, the
screen keys have been set up with useful shortcuts and
functions.
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