Smoothing Bandwidth Multiplier Specify a nonnegative number tuning the smoothness of all computed surfaces. Use the following scale as a guide for the appropriate value: Value Degree of Smoothing 0 None 0.5 Mild 1 Moderate (Default) 2 Heavy 3 Maximum To Specify a Smoothing Bandwidth Multiplier: Select Kernel Surface as the Background Correction Method. Type a value between 0 and 3, inclusive, in the Smoothing Bandwidth Multiplier field.