# LibTmux.TmuxOptionKey.BaseIndex

- **Module:** LibTmux
- **Package:** LibTmux
- **Language:** C#
- **Kind:** property
- **Source:** https://github.com/libtmux/libtmux-dotnet/blob/cf34b255c896d19a97e7d7fabea58609c916012d/src/LibTmux/Options/TmuxOptionKey.cs#L61
- **Page:** https://libtmux.org/en/csharp/latest/reference/libtmux-tmuxoptionkey-baseindex/

Gets the index a session's first window gets; a session option.