The default background color for all bubbles is yellow. You can change this default for the current frame. This option is useful for calling attention to certain steps.
Note: You can also change the bubble background color in all frames in all topics to grey by customizing a publishing setting. This setting also changes the header in the bubble to a grey color, and the shape of the bubble to a square. See Customize the Player in the Publish Content section for more information.
To change the background color of the bubble for the current frame: