Left click in the 3D graph to pan, right click to zoom. Press w to get a wireframe, s to go back to a surface. Press t to go to trackball mode, j to return to joystick. Don't press e.
Compute: recomputes with new inputs. The plot type must change for the graph to update. To recompute with the same plot type, click "Blank" first.
Change Plot Type: Select from plot type drop down and click this button. No other settings are updated in the plot. Use Compute if you want to change the settings
Blank: Clears the 3D plot
Snapshot: Produces a JPG of the graph, stored in c:\temp as test1.jpg, test2.jpg etc.
Print: Prints the graphic to a random printer connected to your machine. Still under development!