Control the presentation of the “superposition waveform” in the top panel.
PIXEL = A-B
The waveform shown in the top panel will be calculated by subtracting pulse amplitudes of the B-waveform from the corresponding pulse amplitudes of the A-waveform.
This is the default choice.
PIXEL = B-A
The waveform shown in the top panel will be calculated by subtracting pulse amplitudes of the A- waveform from the corresponding pulse amplitudes of the B-waveform.