# libtmux::kFormatSeparator

- **Module:** libtmux
- **Package:** libtmux-cxx
- **Language:** C++
- **Kind:** attribute
- **Source:** https://github.com/libtmux/libtmux-cxx/blob/85e8bd603a322dc32bb8b9aeb1a72bcf36945f1d/include/libtmux/snapshot.hpp#L43
- **Page:** https://libtmux.org/reference/cxx/libtmux-kformatseparator/

tmux joins requested formats with a separator that cannot appear in a format name.

U+241E matches the Python implementation's default so both can read the same recorded output.

It is multi-byte, so every tmux this library starts is passed `-u`: a tmux that believes the terminal is not UTF-8 substitutes an underscore and no row splits at all.