Directional Drill
The lines or spokes dont have to be straight, and they can be of any
directional drill length required. The circles dont have to be circles; they can be squares, triangles, or oval squiggles if you prefer.
directional drill Draw a circle around the sub-theme words, and then join your sub-theme circle to the main theme circle with a line. Keep listening or reading, watching for the first main sub-theme.