This is like the central bone of a big fish, with a main line running through it, so other auxiliary fishing lines are only auxiliary and will never replace the central bone.
Only when the logic is clear, the whole PPT will be clear to people at a glance, and the PPT producers and PPT listeners can follow the logical route without deviation or architectural deviation. The meaning of this "key" is the same as that of laying a good logical framework before writing an article, but the effect is the same. The most important thing is to draw a conclusion first and make a logical explanation around a central idea, which is also known as the "golden pyramid principle".
There are no more than three PPT fonts for beginners' expanded materials: imitation song style, song style, or standard English format, and no more than three fonts at most. When there are more than three kinds, the layout will appear very messy and disorderly, which will affect the impression.
No more than 3 colors: express one color, emphasize expression, and distinguish details with another color. Well, no more!
There are only three kinds of animations: when there are too many animations such as page clipping, illustration and text demonstration on a PPT, the audience's attention is likely to be disrupted and unable to concentrate, and naturally it is difficult to catch the audience's eye, so the effect of the demonstration is bound to be greatly reduced.