What is the term for displaying information in a diagrammatic or logical form?

The most appropriate term for displaying information in a diagrammatic or logical form is "illustrate." This term specifically refers to the act of making something clear or explaining it through visual means, such as diagrams or graphs. When information is illustrated, it becomes easier to understand complex relationships and patterns by providing a visual context.

Constructing a diagram or representation involves the creation of visual forms, but "illustrate" emphasizes the purpose of using these forms to explain or communicate information effectively. While "diagram" and "represent" relate to visual or conceptual displays, they don't convey the purpose of clarity and explanation as directly as "illustrate."