# prefix2

Source: https://libtmux.org/en/tmux/3.7c/catalog/options/prefix2/

> Set a secondary key accepted as a prefix key.

option tmux3.7c

Set a secondary key accepted as a prefix key.

* Scope

  session

* Type

  Key

* Default

  `None`

* Set

  [`set-option`](https://libtmux.org/en/tmux/3.7c/manual/set-option/) `prefix2 value`

* Read

  [`show-options`](https://libtmux.org/en/tmux/3.7c/manual/show-options/) `prefix2`

## Description[#](https://libtmux.org/en/tmux/3.7c/catalog/options/prefix2/#description)

Set a secondary key accepted as a prefix key. Like `prefix`, `prefix2` can be set to ‘`None`’.

## Releases[#](https://libtmux.org/en/tmux/3.7c/catalog/options/prefix2/#releases)

* [tmux 3.7c](https://libtmux.org/en/tmux/3.7c/catalog/options/prefix2/) : present
* [tmux 3.2a](https://libtmux.org/en/tmux/3.2a/catalog/options/prefix2/) : present

## Source[#](https://libtmux.org/en/tmux/3.7c/catalog/options/prefix2/#source)

* Defined in

  [`options-table.c:783`](https://github.com/tmux/tmux/blob/e476c1230b958df0cb12977517d24b3dc931375b/options-table.c#L783)

* C source reference

  [`options_table`](https://libtmux.org/en/tmux/3.7c/reference/c-variable-options_table/)

* CLI Manual

  [Original manual entry](https://libtmux.org/en/tmux/3.7c/manual/full/#options-prefix2)

## Used by[#](https://libtmux.org/en/tmux/3.7c/catalog/options/prefix2/#used-by)

Library documentation that names this option.

* Rust

  [`options.generated.PREFIX2`](https://libtmux.org/en/rs/latest/reference/options-generated-prefix2/)