According to the dual coding theory, the combination of visual and verbal information allows people to remember more information than a single channel. So when I am creating PowerPoint, I will add more pictures with information to make the visual content richer. Make PowerPoint look less text, less bloated, and at the same time make it easier for readers to remember more content. The neurological myth proposes that children will learn better in a rich environment. In contrast, in online and multimedia course learning, if there are videos, pictures and texts mixed with each other, it will make students more efficient in learning than a single text PowerPoint. I once took a course about Canadian economic history. It was about the economic development process of Canada since the First World War. This is a partial liberal arts course. There are a lot of knowledge points to memorize, but the instructor put a lot of data graphs in the PowerPoint, including bar graphs and table graphs. Very intuitive and easy to understand, and you can quickly memorize the key points according to the chart

Reference

Alexander, K. (2017). Dual Coding Theory [Mp3]. https://soundcloud.com/user-433569679/dual-coding-theory

Hubel DH, Wiesel TN. 1977. Ferrier lecture: functional architecture of macaque monkey visual cortex. Proc R Soc Lond B 1981:1-59