Current
Select the Current option button to specify
current-related properties of the waveform.
If the frequency domain spectrum has not been calculated since a current
waveform property has changed, the status bar under the Current option
button will be red. Otherwise, the status bar will be green.
When the status bars beneath both the Voltage option
button and the Current option button are green the status bar beneath the
Source button on the Main form will be green once the Source form is
closed.

More:
Common Mode Current
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