# libtmux::kFormatSeparator

- **Module:** libtmux
- **Package:** libtmux-cxx
- **Language:** C++
- **Kind:** attribute
- **Source:** https://github.com/libtmux/libtmux-cxx/blob/393d4b0ad666f18a6581f1eb281741a75a7503f0/include/libtmux/snapshot.hpp#L43
- **Page:** https://libtmux.org/en/cxx/latest/reference/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.