The Lightning Bolt sliders control the layout of the segments.

The Forking slider controls the shape of a lightning bolt, i.e. how much the bolt forks. At 0% forking, the bolt is a single sequence of connected segments (i.e. only if the erraticness is set to 0%). As the forking increases, so does the number of forks in the bolt (this can be best seen if the erraticness is low and the number of forks is high).

The Erraticness slider controls how chaotic the entire lightning bolt is. At 0% erraticness, the bolt is very structured and predictable. As the erraticness increases, the structure decreases and the unpredictability increases.

The Angle slider controls the angle between sets of parent and child segments. That is, the angle controls how wide the bolt is (narrow for low angles and wide for high angles).

The Spiral slider controls how much the bolt twists along its guideline from its source to its target. At the extreme values, 0% spiral results in a two dimensional object; 100% spiral results in a narrow tightly twisted object.

The Thickness falloff slider controls how quickly the secondary (the non-main) segments decrease in width. At 0%, each segment has the same width. At 100%, all secondary segments are as narrow as possible.