When you are subtracting a base line from catalytic or non-catalytic data, the raw data are plotted in yellow, and the base line is overlaid in blue, both in the main box; the difference is plotted in the lower box. The markers used for defining the baseline are drawn on the data as small white squares.
The spline routine is called with the b command
A polynomial baseline most useful for catalytic data is called with the B command
The reg command, can be used to substract or divide by a linear baseline.
The div command, is used to divide the data by a control signal.
The S command, is for subtracting a control signal.
The film_decay command, is used to correct chronoamperometric data when the current is a step funciton distorted by film loss