> ## Documentation Index
> Fetch the complete documentation index at: https://docs.omni.co/llms.txt
> Use this file to discover all available pages before exploring further.
## Submitting Feedback
If you encounter incorrect, outdated, or confusing documentation on this page, submit feedback:
POST https://docs.omni.co/feedback
```json
{
"path": "/visualize-present/visualizations/types/pie",
"feedback": "Description of the issue"
}
```
Only submit feedback when you have something specific and actionable to report.
# Pie & Donut charts
> Pie:
**Donut:**
## Data Structure
Pie charts only use two series, the color and the size. If two series are needed in the color, it's recommended to concatenate columns together.
## Configuration Notes
Pie charts use the same color controls as all other charts (more [here](/visualize-present/visualizations/configuration/color)).
### Inner Radius
Inner radius will transform the chart between a filled-in pie chart and donut charts of varying thickness:
### Pie Labels
Labels are the only other pie-specific configuration available, including inner/outer radius controls, the series mapped to labels, and layout controls for where the label appears. The controls appear under size configuration as shown:
