# types.FormatSubscription.scope

- **Module:** types.FormatSubscription
- **Package:** libtmux
- **Language:** TypeScript
- **Kind:** property
- **Source:** https://github.com/libtmux/libtmux-ts/blob/3fe1ca654b81b8cbf4a13b777a001a3298c87a6f/packages/libtmux/src/types.ts#L604
- **Page:** https://libtmux.org/en/ts/latest/reference/types-formatsubscription-scope/

What the format is expanded against. Omitted expands once per session.

A window or pane id subscribes to that object; `"all-panes"` and
`"all-windows"` subscribe to each one in the attached session, reporting
separately for each.