# tmux.Session.SetDefaultSize

- **Module:** tmux.Session
- **Package:** github.com/libtmux/libtmux-go/tmux
- **Language:** Go
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-go/blob/5f808882015a975a65acc7f9da5b3ff0d5cbdc91/tmux/option_generated.go#L5029
- **Page:** https://libtmux.org/reference/go/tmux-session-setdefaultsize/

```
tmux.Session.SetDefaultSize(ctx: context.Context, value: string) -> error
```

SetDefaultSize stores the "default-size" session option as string (tmux 3.2a or later). Read it with [SessionOptionValues.DefaultSize] from [Session.Options]; [Session.UnsetOption] restores inheritance or the global default.