This is an exhaustive list of special values accepted for the `key0` through `key8` or `nw` through `se` attributes on a key. Any string that does not exactly match these will be printed verbatim.
## Escape codes
Value | Escape code for
:---- | :------
`\?` | `?`
`\#` | `#`
`\@` | `@`
`\n` | Literal newline character. This is different from `enter` and `action` in certain apps.
`\t` | Literal tab character. This is different from `tab` in certain apps.
`\\` | `\`
XML escape codes also work, including:
Value | Escape code for
:------- | :------
`&` | `&`
`<` | `<`
`>` | `>`
`"` | `"`
## Modifiers
System modifiers are sent to the app, which is free to do whatever they want in response.
The other modifiers only exist within the keyboard.
Value | Meaning
:---------- | :------
`shift` | System modifier.
`ctrl` | System modifier.
`alt` | System modifier.
`meta` | System modifier. Equivalent to the Windows key.
`fn` | Activates Fn mode, which assigns letters and symbols to special characters. e.g. `fn``!` = `¡`
`compose` | Compose key. Enables composing characters using Linux-like shortcuts; e.g. `Compose``A``single quote` types `Á` (A with acute accent).
`capslock` | Actives and locks Shift
## Special keys
These keys are sent to apps, which are free to ignore them. The keyboard do not perform editing in response to these keys.
These keys perform editing on the text without sending keys that the app can interpret differently or ignore.
Value | Meaning
:----------------- | :------
`cursor_left` | Moves the cursor position to the left directly, without sending a `left` key event.
`cursor_right` | Moves the cursor position to the right directly, without sending a `right` key event.
## Other modifiers and diacritics
Value | Meaning
:------------------- | :------
`accent_aigu` | Acute accent. `á`
`accent_caron` | Háček. `č`
`accent_cedille` | Cedilla. `ç`
`accent_circonflexe` | Circumflex. `â`
`accent_grave` | Grave accent. `à`
`accent_macron` | Macron. `ā`
`accent_ring` | Ring accent. `å`
`accent_tilde` | Tilde. `ã`
`accent_trema` | Dieresis/umlaut. `ä`
`accent_ogonek` | Ogonek. `ą`
`accent_dot_above` | Dot accent. `ż` If applied to the lowercase `i`, removes the dot instead for Turkish. `ı`
`accent_double_aigu` | Double acute accent. `ő`
`accent_slash` | Slash through. `ø`
`accent_arrow_right` | Right arrow above, used to denote a vector. `a⃗`
`accent_breve` | Breve. `ă`
`accent_bar` | Bar/strikethrough. `ᵢ`
`accent_dot_below` | Dot below. `ạ`
`accent_horn` | Horn accent. `ơ`
`accent_hook_above` | Hook accent. `ả`
`superscript` | Superscript. `ᵃ`
`subscript` | Subscript. `ₐ`
`ordinal` | Turns `a` and `o` into `ª` and `º`.
`arrows` | Turns `1`-`4` and `6`-`9` into arrows.
`box` | Turns `1`-`9`, `0`, and `.` into single-line, thin box-drawing characters.
## Bidirectional
Value | Meaning
:------ | :------
`lrm` | Left-to-right mark.
`rlm` | Right-to-left mark.
`b(`, `b)`, `b[`, `b]`, `b{`, `b}`, `blt`, `bgt` | Sends the bracket characters, but with mirrored key legends for right-to-left languages. (`blt` and `bgt` print `<` and `>` respectively.)
## Hebrew
Keys ending in `_placeholder` are normally hidden unless the Fn key is pressed.
`switch_text` | Switch to the text layer (main layer).
`switch_numeric` | Switch to the numeric layer.
`switch_emoji` | Switch to the emoji layer.
`switch_back_emoji` | Switch to the text layer from the emoji layer.
`switch_forward` | Change the keyboard layout, as long as Unexpected Keyboard has multiple keyboard layouts enabled in the settings.
`switch_backward` | Change the keyboard layout to the previous one in the list.
`switch_greekmath` | Switch to the Greek & Math Symbols layer.
`change_method` | Open the input method picker dialog.
`change_method_prev` | Switch to the previously used input method.
`action` | Performs a special context-sensitive operation related to the Enter key. For example, in the Twitter (X) app, `enter` adds a new line, while `action` posts.
`voice_typing` | Begin voice typing.
`voice_typing_chooser` | Shows a menu where you can choose which voice typing provider to use, then begins voice typing when you make a selection.
`shareText` | Emit a share Intent for the selected text. **Oddity:** This is in CamelCase.
## Unused
These keys are known to do nothing.
`replaceText`, `textAssist`,
`autofill`, `removed`
## Placeholders
These keys are normally hidden unless the Fn modifier is activated.
