This method is used when rescaling Gain and Offset. Gain is a variable used in changing the amplitude, while Offset is a variable used in vertical positioning of waveform. These variables are explained in the following figures for your understanding.
As you can see in the above figures showing changes of amplitude, the solid line indicates data with higher amplitude, while the dotted line indicates data with lower amplitude. Change of amplitude will not change the frequency of signal, but the height of waveform. Change of Offset is not change of signal components, but that of signal positions. This can be used when changing data within -1 to 1 into data within 0 to 2. Select data you want to apply this method in Analysis Window and click the icon of Rescaling by Gain and Offset in Analysis Tool Bar. This will display a dialogue box for setting of Gain and Offset as shown in the following figure. Input Gain and Offset values as you need and click Apply button. The graph is shown in Display Window and registered at Analysis Window.