Volume Curve

The Volume Curve tool lets you define volume curves by adding a set of curve points. You can add a curve point by moving the mouse cursor over the curve. The mouse cursor turns into a pointing hand. Now you can click the mouse button to create a new curve point and move it around with the using the mouse. Double click a curve point to remove it again.

Notice the focused curve point (white outline), the two arrow shaped handles at each side and the smooth curve before the focused curve point.

You can choose how to interpolate the curve between two curve points. Click one of the curve points so that it gets focused (indicated with a white outline). Now, two arrow shaped handles appear to the left and to the right of the curve point. You can drag these to get a smoother transition on either side.