Explanation

• A visual aid – also called a visual – is a picture, chart, video, etc., that you use to help people understand or remember something; for example, during a presentation.

  A handout is a document you give to the people attending a presentation, class, etc., that contains information about the subject you’re discussing.

• visual aid （ visual とも言います）は、例えばプレゼンテーションの中で、聞き手の理解や記憶を助けるために使う、写真や図表、映像などの、視覚教材のことです。

  handout は、プレゼンテーションや授業などに出席している人に配る書類のことで、これには、検討する話題に関する情報が含まれています。

1. (conference organizer to speaker)

   Let me know if you’re using any visual aids so that I can set up any equipment you might need.

2. You should probably include some more visuals in your presentation. Otherwise, I think people are going to lose interest fast.
3. I’ve passed out a handout listing some books and articles for anyone who’d like to learn more about the subject of my talk.
4. There’s a map of our proposed new store locations on the third page of the handout.