What is telestration?

Telestration is the practice of drawing freehand over live or replayed video so viewers can see exactly what a presenter is talking about. An analyst circles a player, traces a storm's path, or highlights a county on an election map, and the marks appear on screen in real time. The device or software used to do it is called a telestrator.

September 3, 2026

Telestration is the practice of drawing freehand over live or replayed video so viewers can see exactly what a presenter is talking about. An analyst circles a player, traces a storm's path, or highlights a county on an election map, and the marks appear on screen in real time. The device or software used to do it is called a telestrator.

Where telestration came from

Physicist Leonard Reiffel invented the telestrator in the late 1950s and first used it on science programs for Chicago public station WTTW. Chicago's WBBM-TV then adopted it for sports and weather segments. NFL analyst John Madden made it famous, using it for years to diagram plays during broadcasts.

How telestration is used on air

Early telestrators used a light pen or stylus on a separate monitor. Today, most telestration happens directly on a touchscreen or tablet, layered over live graphics.

  • Sports: diagramming plays, routes, and player positioning on replays
  • Weather: tracing a front, circling a storm cell, or marking the area under a warning
  • Elections: circling counties or districts that will decide a race, drawing a candidate's path to victory, or linking regions that are voting the same way

In election coverage, telestration is usually combined with an interactive results map, so the analyst can zoom into an area and annotate it in the same motion.

Why telestration matters for broadcasters

Telestration turns explanation into something the audience can see. A sentence like "the result here depends on these three counties" lands harder when the presenter circles them as they say it.

For production teams, the practical questions are:

  • Who controls it? The best results come when the presenter draws directly, without waiting on an operator.
  • What does it draw on? Annotation over live, updating data is more useful than annotation over a static image.
  • How clean is it? Marks need to be easy to clear and redraw as the story changes during a live segment.

Related terms

Telestration over live results maps is a core feature of IK Election Insights.

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