# Domain

> A chart word, with the charts that use it.

**Definition.** The domain is the range of values an axis covers, from its lowest to its highest tick. Choosing it decides how big differences look.

Updated Nov 2, 2026

## 010 · Line

- **01 The top of the domain.** The highest tick the axis shows.
- **02 The bottom of the domain.** The lowest tick, here zero.

## Where you see it

- [001 · Bars](https://usechartory.com/charts/bars): Compare items · Fintech data
- [010 · Line](https://usechartory.com/charts/line): Change over time · AI data

## Common mistakes

- **A domain that cuts off the bars** Bars need a domain from zero, or their length lies.
- **A domain much wider than the data** The line flattens and changes disappear. Fit lines and dots to the data.

## Questions

### Should the domain start at zero?

For bars, yes. For lines and dots it can fit the data, as long as the axis says where it starts.

### Who sets the domain in Chartory?

Each chart sets it from its data at every size, with round ticks.

## Related terms

- [Axis](https://usechartory.com/glossary/axis): The scale along the edge of a plot that gives marks their value.
- [Tick](https://usechartory.com/glossary/tick): A small mark on an axis at a round value, with its label.
- [Baseline](https://usechartory.com/glossary/baseline): The zero or reference line that bars grow from.

## Bars, line and the other types.

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