There are three basic chart worksheets. They are built with random numbers. Stacked Bar and Scatter.Mesa and Piece of Pie.Mesa both contain report formats. Just click on the Print: tool in the upper right of the window to print the charts.
The sin_cos_example.Mesa shows off the new XY chart type. It uses the SAME() to select the formula for plotting the curves. You only need to change the formulas in cells B2 and C2 to plot different functions. Also note that the equations on the graph were written using EqB from Digital Tool Works (info@dtw.com) and directly imported to Mesa by dragging and dropping the .eqn file on the worksheet.