• (2) Drag the curve itself. Note how this changes the sizes of the direction lines
"facing in" towards the curve. Try dragging the curve in all directions to see how the direction lines change shape. Note how this changes the size of the curve, but doesn't greatly affect how the curve arcs.
• (3) Click and drag a direction point on either end of the curve. This changes the arc and the direction, depending on how the direction line is changed.
• Note that, if the direction point you are moving IS NOT a corner point, you also affect the neighboring curve. If it IS a corner point, since the direction lines are independent, the neighboring curve is unaffected.