Designing Annotations in Visualization: Considerations from Visualization Practitioners and Educators

A new research paper from the University of South Florida and the University of Utah, titled 'Designing Annotations in Visualization: Considerations from Visualization Practitioners and Educators,' provides a deep dive into the professional practice of annotating data charts. Published on arXiv and accepted for EuroVis 2026, the study moves beyond simply cataloging visual forms of annotations to uncover the decision-making processes behind them. Through interviews with ten practitioners from diverse fields, the researchers identified the specific heuristics and contextual judgments experts rely on to make charts communicate effectively.

The complementary phase of the study involved seven visualization educators, who framed annotation design within broader pedagogical concerns like clarity, guidance, and preserving viewer agency. By making this often-tacit professional knowledge explicit, the research bridges a gap between academic theory and real-world application. The findings highlight the complex trade-offs involved—such as balancing explanatory detail with visual clutter—and point directly to opportunities for developing improved software tools and practical design guidelines for data communicators and analysts.