# Charts

Charts show how one catalog measurement moves. They read the same on-device grids as Explore. Open them from a measurement's detail.

## Kinds

| Chart | What it shows |
| --- | --- |
| Trajectory | The measurement across ages |
| Percentile | A curve across percentiles at the current setup |
| Country | The same person-description compared across countries |
| Age | Compared across ages |
| Gender | Male, female, and everyone |
| 3D Surface | Age, percentile, and the predicted value together |
| 3D Relationships | Three related measurements across age |

On systems without a 3D chart view, the 3D kinds fall back to a flat chart.

## Access

Without Pro, a trajectory chart is available for measurements in the free catalog. Percentile, country, age, gender, and both 3D charts require [Humanform Pro](https://docs.humanform.app/pro).