# tmux.SetEnvironmentOptions

- **Module:** tmux
- **Package:** github.com/libtmux/libtmux-go/tmux
- **Language:** Go
- **Kind:** struct
- **Source:** https://github.com/libtmux/libtmux-go/blob/5f808882015a975a65acc7f9da5b3ff0d5cbdc91/tmux/environment.go#L21
- **Page:** https://libtmux.org/reference/go/tmux-setenvironmentoptions/

SetEnvironmentOptions controls tmux's value expansion and visibility flags. Its zero value stores Value literally and exposes it to child processes.

## Members

- `ExpandFormat` (attribute) — ExpandFormat expands tmux format expressions in Value before storing it.
- `Hidden` (attribute) — Hidden keeps the value available to tmux but out of child environments.