There are three ways that the user can specify the values that get mapped to the warmest and coldest color. Choose Automatic if you want SatView to automatically map the maximum and minimum values in a satellite image file to its coldest and warmest colors, respectively. Choose Manual if you wish to set the maximum and minimum values manually. This might be desirable if you want to apply the whole range of colors to only a small range of values. Choose Header Values if you want to use the maximum and minimum values contained in the data file header. If these values are not valid, SatView will choose a range as described for Automatic.