Key remapping

Helix currently supports one-way key remapping through a simple TOML configuration file. (More powerful solutions such as rebinding via commands will be available in the future).

To remap keys, create a config.toml file in your helix configuration directory (default ~/.config/helix on Linux systems) with a structure like this:

# At most one section each of 'keys.normal', 'keys.insert' and 'keys.select'
[keys.normal]
C-s = ":w" # Maps Ctrl-s to the typable command :w which is an alias for :write (save file)
C-o = ":open ~/.config/helix/config.toml" # Maps Ctrl-o to opening of the helix config file
a = "move_char_left" # Maps the 'a' key to the move_char_left command
w = "move_line_up" # Maps the 'w' key move_line_up
"C-S-esc" = "extend_line" # Maps Ctrl-Shift-Escape to extend_line
g = { a = "code_action" } # Maps `ga` to show possible code actions
"ret" = ["open_below", "normal_mode"] # Maps the enter key to open_below then re-enter normal mode

[keys.insert]
"A-x" = "normal_mode"     # Maps Alt-X to enter normal mode
j = { k = "normal_mode" } # Maps `jk` to exit insert mode

Minor modes

Minor modes are accessed by pressing a key (usually from normal mode), giving access to dedicated bindings. Bindings can be modified or added by nesting definitions.

[keys.insert.j]
k = "normal_mode" # Maps `jk` to exit insert mode

[keys.normal.g]
a = "code_action" # Maps `ga` to show possible code actions

# invert `j` and `k` in view mode
[keys.normal.z]
j = "scroll_up"
k = "scroll_down"

# create a new minor mode bound to `+`
[keys.normal."+"]
m = ":run-shell-command make"
c = ":run-shell-command cargo build"
t = ":run-shell-command cargo test"

Special keys and modifiers

Ctrl, Shift and Alt modifiers are encoded respectively with the prefixes C-, S- and A-. Special keys are encoded as follows:

Keys can be disabled by binding them to the no_op command.

Commands

There are three kinds of commands that can be used in keymaps:

• Static commands: commands like move_char_right which are usually bound to keys and used for movement and editing. A list of static commands is available in the Keymap documentation and in the source code in helix-term/src/commands.rs at the invocation of static_commands! macro.
• Typable commands: commands that can be executed from command mode (:), for example :write!. See the Commands documentation for a list of available typeable commands or the TypableCommandList declaration in the source code at helix-term/src/commands/typed.rs.
• Macros: sequences of keys that are executed in order. These keybindings start with @ and then list any number of keys to be executed. For example @miw can be used to select the surrounding word. For now, macro keybindings are not allowed in keybinding sequences due to limitations in the way that command sequences are executed.