Keypad
Mode l8500C/8500C+ Operators Manual
4-5
4.2.3 Soft Keys
The four grey soft function keys are located just below the display (see Fig u re4-5 on pa ge4-10). They
differ from the other keys in that their functions vary according to the state of the 8500C/C+. This
feature provides easy access to any special functions to be used while the instrument is in a particular
state or mode. If a soft key is operational, its function is defined in a label at the bottom of the display,
directly above the key. Note that if a soft key label is hidden from view its function may still be
invoked by pressing the key. In other words, labels do not have to be visible in order to execute a soft
key function. See the explanation of th
SHOW/HIDE
key in Section 4.2.3.2 “SHOW/HIDE Key” on
page 4-7.
There are two types of soft function keys, as follows:
•Action
•Mode
Action
soft keys typically change the display and initiate a major transition or action. Action soft key
labels appear with solid black rectangles. In Figure4- 5 on page4-10 th
RED OMEAS
,
SEL CHART
,
and
SOLUTION
soft keys are action soft keys.
The second type of soft key is the
Mode
soft key. A mode soft key defines a number of user-selectable
operating modes. They are enabled by toggling the soft key, which then selects a new mode and
displays the new setting in the soft key label. Mode soft keys have a diamond-shaped label contained
in a thin black border.
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