Wavetek MS1000 Operation Manual page 17

You can selectively enable or disable each individual limit. When a
limit is disabled, your microStealth excludes it when checking
limits. If the highlighted limit is disabled, you can enable it by
pressing the soft key. A check mark appears in the left-hand
column to indicate when a limit is enabled. If the limit is already
enabled, pressing the soft key disables it.
Note
If you disable all of the limits within a test point, the test point
becomes disabled. You cannot enable a test point that has no
enabled limits.
You can edit the value of the highlighted limit by pressing the
key. When the edit box becomes active, enter the desired value. Be
sure to press the key when finished to terminate your entry.
Press the soft key to return all limits in the test point to their
factory preset values.
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