> For the complete documentation index, see [llms.txt](https://docs.novacura.com/flow-connect/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.novacura.com/flow-connect/reference/reference/portal/design-items/portlets/accumulation-chart.md).

# Accumulation chart

Accumulation Charts are used to visualize data distribution through chart types such as pie, doughnut, and pyramid charts. These charts illustrate proportions and relationships within datasets, featuring elements like data labels and legends.

## General

General data is required for all portlets, see [General](/flow-connect/reference/reference/portal/design-items/common-portlet-configuration/general.md).

## Events

To set up an event, see [Events](/flow-connect/reference/reference/portal/design-items/common-portlet-configuration/events.md).

## Data

To set up a data source, see [Data](/flow-connect/reference/reference/portal/design-items/common-portlet-configuration/data.md). 

### Data source columns

In the data source column, you can change column names and set their types. Click **Manage** to access a grid view of the configuration. 

### Presentation

* **Chart type:** Select the type of chart the portlet will use.
* **Show tooltip:** This enables tooltips to appear when hovering over data points on the chart.
* **Show legend:** This enables the legend to be displayed on the chart.
* **Name column:** Specifies the category on which the chart is based.
* **Value column:** Defines the dataset that provides the proportional values for the chart.
* **Description column:** Provides the data label that appears in the chart.

## Style

To configure style, see [Style](/flow-connect/reference/reference/portal/design-items/common-portlet-configuration/style.md).


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