# 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

## 010 · Line

- **01 The hovered point.** The point under the pointer.
- **02 The tooltip.** Its exact value and time, on hover.

## Where you see it

- [010 · Line](https://usechartory.com/charts/line): Change over time · AI data
- [034 · Scatter](https://usechartory.com/charts/scatter): Relationship · 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.

## Related terms

- [Mark](https://usechartory.com/glossary/mark): One drawn shape that stands for one data point: a bar, a dot or a slice.
- [Legend](https://usechartory.com/glossary/legend): The key that names each colour or mark.
- [Series](https://usechartory.com/glossary/series): One set of values drawn together, such as one line or one colour of bars.

## Line, scatter and the other types.

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Every chart word, A to Z. [Open the glossary](https://usechartory.com/glossary)