Telestrator

The telestrator is also used in courtrooms to communicate details of multimedia images presented to a jury, as was most famously seen during the O. J. Simpson trial in March 1995.

[2] The telestrator was invented by physicist Leonard Reiffel, who used it to draw illustrations on a series of science shows he did for public television's WTTW in Chicago in the late 1950s.

[3] After he had been using it to help illustrate details to his young science audience, he approached Chicago's CBS affiliate WBBM-TV suggesting it be used in sports and weather.

The late NFL color commentator John Madden famously used a telestrator during football games for many years, boosting the device's popularity.

[6] During his time as a color commentator for NBC and TNT of the NBA, Mike Fratello has been referred to as the "Czar of the Telestrator" by Marv Albert for his masterful way of diagramming basketball plays on screen.

They are also used by Ian Waite on Britain's Strictly Come Dancing: It Takes Two and humorously on the U.S. reality game show Wipeout, mostly by John Henson.