What are common comic transitions and how can they be replicated using a green screen?

Common comic transitions include action lines, speed lines, thought bubbles, and panel borders. To replicate these with a green screen, you can key out the green and replace it with animated versions of these elements. For example, an action line could be a fast-moving graphic keyed over a subject, or a speed line could be a blurred, keyed-in effect trailing behind movement. Panel borders can be static keyed-in overlays.