I want to understand how the icons used in Study room' whiteboard were inserted.
To see what I mean, navigate to the site, click Create button and then Join button on the animation. If you observe closely the tip of the brush, pen etc changes based on the color selected:
From the google developer kit, I don't see any background picture at the place of icon but can see some junk character. Can anyone throw some light on what type of icons are used and how to design those?