Charts / Glossary
Tooltip
A chart word, with the charts that use it.
Definition
A tooltip is the label that appears on hover with the exact value. It lets a chart stay clean while every number stays one hover away.
Updated Nov 2, 2026
- 01The hovered pointThe point under the pointer.
- 02The tooltipIts exact value and time, on hover.
Where you see it
010 · LineChange over time · AI data
034 · ScatterRelationship · Crypto data
Common mistakes
Key numbers only in the tooltip
Touch screens and printouts have no hover. Label what matters on the chart.
Tooltips that cover the data
Place them beside the point, not on top of it.
Questions
Do tooltips work on touch screens?
On tap. Still, label the key values on the chart for anyone who never taps.
What should a tooltip show?
The exact value, its label and, where useful, the comparison.
Every chart word, A to Z.
Open the glossary