Forms are a useful tool for categorizing content and helping users to understand the structure and purpose of a page. They should be used in a way that supports the message, rather than being the main focus.

To make it easy for users to identify different types of content, use different shapes to represent different categories. For example, elements related to a person can be represented with a fully rounded circle, elements related to content can be represented with a square, and elements related to both a person and content can be represented with a rectangle. This helps to create a clear and intuitive visual hierarchy that guides the user through the content.