Processing and Formatting Effects > Flame FX > Gradient >
Type Settings

Gradient Type box
  Select the type of gradient to apply. Some of the gradient settings differ based on the gradient type you choose.

Select: | To create a gradient based on:
--- | ---
Directional | A single straight line spline.
Radial | Two circular geometries.
Spline | A spline that can be manipulated with vertices and tangents.
Point | Multiple coloured points.

For each gradient type, you can gesturally create your gradients in the image window with various widgets, such as splines and vertices. Make sure that Show Widgets is enabled in the Gradient Setup menu.