# LibTmux::Session#new_window

- **Module:** LibTmux::Session#
- **Package:** libtmux
- **Language:** Ruby
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-ruby/blob/c6d9d21771828e583692ca899ed817f9640d6a55/gems/libtmux/lib/libtmux/entity.rb#L103
- **Page:** https://libtmux.org/en/ruby/latest/reference/libtmux-session-new_window/

```
LibTmux::Session#new_window(name: ::String, command: ::Array[::String], receipt: true, index: ::Integer? = nil, cwd: ::String? = nil, environment: ::Hash[::String, ::String] = nil, focus: bool = nil, timeout: ::Numeric = nil, cancel: untyped = nil) -> ::LibTmux::CreationReceipt
```

Behavior: Creation.

Behavior contract: Creation.