In the upper part the configuration of the shock waves is displayed. The string "Triple point" indicates that a case with Mach reflection is considered. If both regular and Mach reflection is possible the state of the upper checkbox determines which solution is plotted.
In the lower part shock polars in the (deflection angle, pressure)-plane are plotted. The red square indicates the solution for which the shock waves are displayed in the upper part.
The incident Mach number and the deflection angle can be adjusted using the sliders.