---
id: fast-foundation.flyoutpostopfill
title: FlyoutPosTopFill variable
hide_title: true
---
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[@microsoft/fast-foundation](./fast-foundation.md) &gt; [FlyoutPosTopFill](./fast-foundation.flyoutpostopfill.md)

## FlyoutPosTopFill variable

A region that always places itself above the anchor, has a width to match the anchor, and is sized vertically by available space

<b>Signature:</b>

```typescript
FlyoutPosTopFill: AnchoredRegionConfig
```