While viewing a data set from the data editor, press F1 to select the GRAPH menu. Press 1 to select S-Gph1, statistical graph 1. You then get a plot of the data set.
If desired, you can adjust the tic marks in the viewing window. Press SHIFT V-Window to access the window editor and reset the Y scale to taste. After adjusting the scales, press EXE, then go through the graph procedure again: press F1 1. You can adjust the general view by pressing F2 to select the ZOOM menu.