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Travis County courtrooms support PowerPoint, digitized exhibits, taped depositions, video evidence, document-camera material, and laptop presentations, but counsel must first obtain the judge's permission before routing a laptop presentation to the courtroom displays.
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YOU MUST FIRST make sure the Judge is ok with you presenting. Then the Judge will have to unlock the video routing source button for you to use it.
The requirement is stated in current official court rules and is attached at court scope, not as a personal preference.