What do we call a visual representation or design used in documents?

A visual representation or design used in documents is referred to as a graphic. Graphics can encompass various forms of visual aids, including illustrations, photographs, logos, and diagrams, which enhance the communication of information in written documents. They serve to draw attention, clarify complex ideas, or make content more engaging, ultimately improving comprehension for the audience.

In contrast, a formula typically refers to a mathematical equation or set of instructions for calculations, while a project plan outlines the steps, resources, and timelines necessary to complete a specific project. A data chart, although it can be a form of graphic, specifically focuses on presenting data in a structured format, such as tables, graphs, or plots, to facilitate understanding and analysis of numerical information. Therefore, the broad category of graphic is the best fit for a visual representation used in documents.