helix-plus/book/src/remapping.md

Key Remapping

One-way key remapping is temporarily supported via a simple TOML configuration file. (More powerful solutions such as rebinding via commands will be available in the future).

To remap keys, write a config.toml file in your helix configuration directory (default ~/.config/helix in 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 the Ctrl-s to the typable command :w which is an alias for :write (save file)
C-o = ":open ~/.config/helix/config.toml" # Maps the 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

NOTE: Typable commands can also be remapped, remember to keep the : prefix to indicate it's a typable command.

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:

Key name	Representation
Backspace	"backspace"
Space	"space"
Return/Enter	"ret"
-	"minus"
Left	"left"
Right	"right"
Up	"up"
Down	"down"
Home	"home"
End	"end"
Page Up	"pageup"
Page Down	"pagedown"
Tab	"tab"
Delete	"del"
Insert	"ins"
Null	"null"
Escape	"esc"

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

Commands can be found at Keymap Commands.

Commands can also be found in the source code at helix-term/src/commands.rs at the invocation of static_commands! macro and the TypableCommandList.