Go to the previous , next section. ... The plot data may be defined to SM in a number of ways. ... The features of SM are described fully in the next few sections, but let us start with a description of how to produce your first SM plot. Before you start, notice that SM is case sensitive. Keywords may be typed in lower or uppercase (as we do in this manual), but we would recommend using lowercase. ... If you are interested, see the section on "overloading". ...