If you have added multiple "Category" fields, drill-down will be enabled - clicking on any slice will take you to the next level. Clicking in the middle will take you back to the previous level. Clicking on any slice acts as a filter for rest of your dashboard. Additionally, if there are more than 15 slices, "others" slice is added. Clicking on "others" slice would reveal the next 15 slices in relative proportions to each other while initial 15 slices are compacted into "previous" slice. Additional styling and settings are available in the paid version.
With drill-down donut chart you can visualize and explore your category-based data quickly and efficiently.
Drill-down. If you add more than one category in the Category selector, drill-down mode is automatically activated. To drill-into data, simply touch the slice of your interest. With a smooth animation, you are taken to the next category. To return to the previous level, tap in the middle of the donut. Depth of the drill-down depends on number of category list in the configuration.
Long-press any of the slices to filter the rest of your dashboard by the chosen slice without drilling-down.
Automatic grouping. If there are more than 15 slices, "others" slice is added. Clicking on "others" slice would reveal the next 15 slices in relative proportions to each other while initial 15 slices are compacted into "previous" slice – this lets you see the important information first and still be able to explore the rest of it.
Get additional features and customization options with the Paid drill-down donut chart (https://zoomcharts.com/en/pricing-powerbi/):
Click here to buy advanced drill-down donut chart: https://zoomcharts.com/en/pricing-powerbi/