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helix-plus/book/src/remapping.md

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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 feature).

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]
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 Control-Shift-Escape to extend_line
g = { a = "code_action" } # Maps `ga` to show possible code actions

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

Control, 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"
< "lt"
> "gt"
+ "plus"
- "minus"
; "semicolon"
% "percent"
Left "left"
Right "right"
Up "up"
Home "home"
End "end"
Page "pageup"
Page "pagedown"
Tab "tab"
Back "backtab"
Delete "del"
Insert "ins"
Null "null"
Escape "esc"

Commands can be found in the source code at helix-term/src/commands.rs