Visual AIDS include: projectors (computers, laser pens, mice), wall charts, whiteboards and things needed in speeches.
What are the key elements of visual materials?
1, show. Showing is for the audience. Most painters and photographers will show their works in this way. 2. Explain the power. A picture is worth a thousand words, and the best explanation is often illustrated.
2. Aesthetic value. Visual materials can greatly enhance the aesthetic feeling of speeches. Similarly, speeches with beautiful fonts, illustrations or custom animations can also produce magical effects.