...
Click Initiate plot to open up the Initialisation panel where the scale, layout and margins are set. In this panel you may also introduce a main dataset. This dataset is optional, but a grid is required if you want to display a contour map.
Observe that the sizes reported at the bottom change when the scaling, coordinates and margins are changed. Select a size that fits your needs and the limitations of your plotter. Your plot may either be scaled to the main dataset or to coordinates which are useful when you want to plot a subsection of the plot.
...