Snyder, Luke S.Rossi, Ryan A.Koh, EunyeeHeer, JeffreyHoffswell, JaneTominski, ChristianWaldner, ManuelaWang, Bei2024-05-172024-05-172024978-3-03868-251-6https://doi.org/10.2312/evs.20241057https://diglib.eg.org/handle/10.2312/evs20241057The ubiquity and on-the-go availability of mobile devices makes them central to many tasks such as interpersonal communication and media consumption. However, despite the potential of mobile devices for on-demand exploratory data visualization, existing mobile interactions are difficult, often using highly custom interactions, complex gestures, or multi-modal input. We synthesize limitations from the literature and outline four motivating principles for improved mobile interaction: leverage ubiquitous modalities, prioritize discoverability, enable rapid in-context data exploration, and promote graceful recovery. We then contribute thirteen interaction candidates and conduct a formative study with twelve participants who experienced our interactions in a testbed prototype. Based on these interviews, we discuss design considerations and tradeoffs from four main themes: precise and rapid inspection, focused navigation, single-touch and fixed orientation interaction, and judicious use of motion.Attribution 4.0 International LicenseCCS Concepts: Human-centered computing → Interaction design; Mobile devices; Touch screens; Information visualizationHuman centered computing → Interaction designMobile devicesTouch screensInformation visualization10.2312/evs.202410575 pages