# showTooltipAtSegment

Polar-only — programmatic tooltip open on a (direction, series) cell.

Canonical: https://chart.syidax.com/docs/methods/showTooltipAtSegment/

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## Definition

```typescript
showTooltipAtSegment(categoryIndex: number, seriesIdOrIndex: string | number): Promise<PolarChartPointEventDetail | null>
```

| Arguments | Type | Required |
| --- | --- | --- |
| `categoryIndex` | `number` | Required |
| `seriesIdOrIndex` | `string \| number` | Required |

Return type: `Promise<PolarChartPointEventDetail | null>`. Call the method after element registration and await its Promise result.

- [PolarChartPointEventDetail](https://chart.syidax.com/docs/types/PolarChartPointEventDetail.md) — Type definition

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## Related charts

- [sy-polar-chart](https://chart.syidax.com/docs/components/polar.md#method-showTooltipAtSegment)