The Contour plot attributes window provides controls that allow you to specify artificial minima and maxima for the data in the plot. This is useful when you have a small range of values that are of interest and you only want the contours to be generated through that range. To set the minimum value, click the Min check box to enable the Min text field and then type a new minimum value into the text field. To set the maximum value, click the Max check box to enable the Max text field and then type a new maximum value into the text field. Note that either the min, max or both can be specified. If neither minimum nor maximum values are specified, VisIt uses the minimum and maximum values in the database.