Visual Aids & Visual Sketches during Closing Argument

Question 1: How often do trial lawyers, during closing argument, use visual aids -- diagrams, charts, models, digital images, and the like -- that were not admitted into evidence during the submission of evidence at trial?

Question 2: How often do trial lawyers, again during closing argument, use sketches or other visual aids to depict their arguments about the evidence in the case?

If anyone out there has any anecdotes or other information, I would very much like to hear from you.

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