What is a key guideline for using visual aids in a presentation?

Testing all equipment beforehand is essential to ensure that your visual aids display correctly and function as intended during your presentation. This guideline helps avoid technical difficulties that could disrupt the flow of your presentation and distract from your message. By verifying that projectors, screens, and any digital tools are working properly, you can present with confidence, maintain the attention of your audience, and convey your content seamlessly. It allows for adjustments and troubleshooting to be handled prior to the presentation, thus ensuring a smooth delivery and a more professional outcome.