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helix/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:
```toml
# 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 = "select_line" # Maps Control-Shift-Escape to select_line
[keys.insert]
A-x = "normal_mode" # Maps Alt-X to enter normal 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`](https://github.com/helix-editor/helix/blob/master/helix-term/src/commands.rs)