Rockin' it Old School!
Many of you may not know this, but way back when (prior to the year 2000), many storyboards were actually rendered with color markers on paper! During those halcyon days of advertising, yours truly wrote a 64-page book sold around the world about the usage of markers. And believe it or not, it's still sold on Amazon! https://www.amazon.com/Marker-Rendering-Artists-Library-Murrison/dp/156010127X