Animation presents visual change through displayed states over time. In data visualization, movement attracts attention and can reveal how values or layouts change. section 2.1.4 section 7.1.3
Use animation deliberately:
- Animate changing bars, lines, bubbles, or other marks when showing evolving data or a rearranged display. section 2.1.4
- Use motion as feedback after filters, toggles, or other interactions, keeping the response visible near the interaction. section 7.1.3
- Balance attention against analysis: motion can grip viewers, but excessive distraction or slow performance weakens the experience. section 2.1.4 section 7.1.3
From racing bars to changing bubbles
A racing bar chart can seize attention without supporting careful analysis. Gapminder’s World Health Chart offers a richer example: bubbles move across income and life-expectancy axes as years advance, making historical changes visible. section 2.1.4
Figure 7.3 Some ways to show the user that their interaction has changed the data being displayed are to change labels such as titles, move a highlighter box, and/or change font styling.
See how changing labels, moving a highlight, and altering font styling can accompany animation to confirm that an interaction changed the displayed data. section 7.1.3




