Visual load refers to the cognitive effort required to understand a visual or a dashboard.
It’s influenced by:
- Number of visuals on a page
- Complexity of charts (3D, stacked, clustered)
- Excessive labels, colors, or gridlines
- Overuse of slicers and filters
High visual load slows comprehension, increases errors, and overwhelms users.
For example, a dashboard with 15 charts, multiple slicers, and bright colors caused users to miss key KPIs.
Reducing visual load improves:
- Readability: Users grasp key insights faster
- Decision speed: Focus on what matters
- User adoption: Less confusion, higher engagement
Best practice: Keep dashboards simple, focused, and visually clean to minimize cognitive load.