# tmux.ChooseTreeRequest.Format

- **Module:** tmux.ChooseTreeRequest
- **Package:** github.com/libtmux/libtmux-go/tmux
- **Language:** Go
- **Kind:** attribute
- **Source:** https://github.com/libtmux/libtmux-go/blob/52968a3181c1c9e6d1b26c565d4b170968ae61c0/tmux/pane_modes.go#L66
- **Page:** https://libtmux.org/en/go/latest/reference/tmux-choosetreerequest-format/

Format is a tmux format expression evaluated for each tree item. Nil leaves the configured format; nonnil empty remains an explicit format.