In the previous chapter we have learned about using KUPLOT to plot 1D data sets. Now we will extend the usage of KUPLOT to 2D data sets, i.e. xyz-data. The coordinates x and y are within the drawing plane and the z values are represented by contour lines at given zc values, by the bitmap colour or both. Changing the general appearance of the plot such as defining title lines, labels or tick mark intervals was described in section 2.2 of this manual and works exactly the same way when plotting 2D data sets.