# prefix

Source: https://libtmux.org/en/tmux/3.2a/catalog/options/prefix/

> Set the key accepted as a prefix key.

option tmux3.2a

Set the key accepted as a prefix key.

* Scope

  session

* Type

  Key

* Default

  `C-b`

* Set

  [`set-option`](https://libtmux.org/en/tmux/3.2a/manual/set-option/) `prefix value`

* Read

  [`show-options`](https://libtmux.org/en/tmux/3.2a/manual/show-options/) `prefix`

## Description[#](https://libtmux.org/en/tmux/3.2a/catalog/options/prefix/#description)

Set the key accepted as a prefix key. In addition to the standard keys described under [KEY BINDINGS](https://libtmux.org/en/tmux/3.2a/manual/full/#KEY_BINDINGS), `prefix` can be set to the special key ‘`None`’ to set no prefix.

## Releases[#](https://libtmux.org/en/tmux/3.2a/catalog/options/prefix/#releases)

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

## Source[#](https://libtmux.org/en/tmux/3.2a/catalog/options/prefix/#source)

* Defined in

  [`options-table.c:521`](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/options-table.c#L521)

* C source reference

  [`options_table`](https://libtmux.org/en/tmux/3.2a/reference/c-variable-options_table/)

* CLI Manual

  [Original manual entry](https://libtmux.org/en/tmux/3.2a/manual/full/#options-prefix)

## Used by[#](https://libtmux.org/en/tmux/3.2a/catalog/options/prefix/#used-by)

Library documentation that names this option.

* Rust

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