# Chart types (/core/build/charts/chart-types)



<CalloutContainer type="info">
  <CalloutDescription>
    **Target Audience**: Non-technical users and builders configuring visualizations in the Library.
  </CalloutDescription>
</CalloutContainer>

## Overview [#overview]

Toucan AI supports several chart types in the **Library** manual editor. Each type has its own dimension, measure, and display options. Use the pages below when you refine a chart after AI creation or build one from scratch in **Manual Edit** mode.

## Prerequisites [#prerequisites]

* A [connected and active database](/core/build/data-connections/how-to/add-a-database).
* A **Data** source (database and query) selected in the chart editor.

## Chart type reference index [#chart-type-reference-index]

| Page                                                                  | Use case                                  |
| --------------------------------------------------------------------- | ----------------------------------------- |
| [Bar chart](/core/build/charts/chart-types/bar-chart)                 | Compare categories or rankings            |
| [Stacked bar chart](/core/build/charts/chart-types/stacked-bar-chart) | Part-to-whole breakdown within categories |
| [Line chart](/core/build/charts/chart-types/line-chart)               | Trends over time or by category           |
| [Circular chart](/core/build/charts/chart-types/circular-chart)       | Share of a whole (pie / donut)            |
| [Heatmap chart](/core/build/charts/chart-types/heatmap-chart)         | Two dimensions with cell intensity        |
| [Value](/core/build/charts/chart-types/value)                         | Single KPI with optional variation        |
| [Table](/core/build/charts/chart-types/table)                         | Tabular data with column-level formatting |

## Shared chart-level settings [#shared-chart-level-settings]

All chart types share these fields at the top of the manual editor:

| Option        | Description                                           |
| ------------- | ----------------------------------------------------- |
| **Title**     | Name shown in the Library and embeds.                 |
| **Narrative** | Optional explanation for end users.                   |
| **Data**      | Database and query that supply columns for the chart. |

## Shared measure options [#shared-measure-options]

Where a chart uses a **metric** column (Bars, Line, Value, etc.), you can usually set:

* **Aggregation** (Sum, Average, Count rows, etc.). Options depend on column type.
* **Format number** — decimals, percent, currency, and **Unit** for numeric columns.

See each chart page above for the exact fields available.

**Suggested next steps**

* [Create a chart](/core/build/charts/how-to/create-a-chart)
* [Create a chart with AI](/core/build/charts/how-to/create-a-chart-with-ai)
* [Customize a chart manually](/core/build/charts/how-to/customize-a-chart-manually)