FX Sketch 
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FX Sketch is a freehand drawing mode for FX Draw. You can draw with your finger on a touch screen or using your mouse and FX Sketch will automatically transform your drawing into a highquality mathematical diagram. FX Sketch is current in beta but is available in FX Draw.
FX Sketch is an alternative userinterface for FX Draw and you always have the full power of FX Draw available to you if you require it.
Here is a short introductory video.
Video  Introduction to FX Sketch Beta
General Hints and Tips
The FX Sketch Screen
Marking PointsDouble click/tap in one location.
Marking AnglesA short line or curve in the corner of the angle. Filling RegionsA small zigzag motion in the region to be filled.
Adding ArrowheadsA small V shape at the end or middle of a line.
Adding Congruency MarksA small line across a line.
Adding MeasurementsDraw a second line on top of the first.
Normal Distribution CurvesDraw a normal distribution curve
Normal Distribution ShadingDraw a vertical line on a normal distribution graph to add shading Function GraphsDraw two lines, as shown (order and direction do not matter), and you will be given the choice to change them to a function graph.
Adding FunctionsYou can draw lines, circles, parabolas and sine curves over a function graph and FX Sketch will graph the function for you. Your sketch of the function cannot go outside the bounds of the graph.
Statistics GraphsDraw the indicated shape and you will be given the choice of converting to a statistics graph.
Venn DiagramsDraw two intersecting circles of approximately the same size and you will be offered the option of turning them into a Venn diagram.
