I want to construct a NACA 23012 airfoil with a slotted flap using JavaFoil. I've been trying to learn how to do this by searching on google but it just doesn't seem to be helping. The JavaFoil's userguide pops up but it doesn't seem to be of much use to me. It would be helpful if someone can guide me on how to construct the airfoil with a slotted flap step-by-step.
I have never used JavaFoil before. I have only learnt to use the Geometry tab so far.
Thanks in advance for your answers!