# LibTmux.FSharp.WindowFields.index

- **Module:** LibTmux.FSharp
- **Package:** LibTmux.FSharp
- **Language:** F#
- **Kind:** constant
- **Source:** https://github.com/libtmux/libtmux-dotnet/blob/cf34b255c896d19a97e7d7fabea58609c916012d/src/LibTmux.FSharp/Query.fsi#L206
- **Page:** https://libtmux.org/en/fsharp/latest/reference/libtmux-fsharp-windowfields-index/

```
val index: Field<LibTmux.Window, int>
```

Identifies where the window sits in its session.