> For the complete documentation index, see [llms.txt](https://docs.antsomi.com/insight-report-user-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.antsomi.com/insight-report-user-guide/insights/reports/untitled/let-viewers-select-the-fields-in-charts.md).
# Let viewers select the fields in charts
Add optional metrics to charts and tables.
### Add optional metrics
1. Edit your report.
2. Select or [add a chart.](/insight-report-user-guide/insights/reports/create-reports/build-stylize-and-add-data-to-reports/add-and-configure-components.md)
3. On the right, in the properties panel under *Metric*, turn on **Optional metrics**.
4. Click **+Add metric** or drag the metric from the *Available fields* panel.
### Select optional metrics in a chart
1. View your report.
2. Hover over a chart with optional metrics, then in the header, click 
.
3. Select the optional metrics from the list.
The number of optional metrics you can select depends on the chart type and number of required metrics already present in the chart.
### Restore the default fields
To revert the chart to its default field set, hover over the chart, then click .
### Limits of optional metrics
* You can have a maximum of 10 optional metrics per chart.
* Optional metrics are not available for pivot tables, scatter charts.