You can see the coordinates of the mouse pointer on a plot, and you can click to record the current position. To start the process, double-click a two-dimensional plot and then choose the new (x,y) tool. A special dialog boxDM6-3.tex#Plot coordinates dialog bar appears with a readout of the current point. Each time you click the plot, a point is recorded.
You can select points in the dialog box for removal, or for pasting into your document. For example, if you record points this way and then paste while the plot is still selected, the points are plotted on the graph.