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openidea/docs/en/reference/settings.mdx
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l0ng-ai cd04593d04 refactor(settings): open Project Structure only as its own dialog (#2744) 
Settings no longer lists a Project Structure page; File › Project Structure…
(⌘; / Ctrl+Alt+Shift+S) opens the standalone dialog, which already had the
same sections. Arrow keys in the dialog's sidebar follow its navigation order.
2026-11-12 00:31:51 +08:00

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---
title: "Settings reference"
description: "Where OpenIDEA stores settings, how the global and project files combine, the Settings pages, and the most-used keys with their defaults."
---
Most settings are easiest to change in the Settings window (see [Settings](/en/guide/settings)). This page describes the files behind it, for when you want to edit, share or script them.
## Files and layers
Settings are combined from three layers, each overriding the one before:
1. Built-in defaults.
2. The global file, `settings.toml` in the configuration directory:
- macOS: `~/Library/Application Support/ai.l0ng.openidea/settings.toml`
- Windows: `%APPDATA%\ai.l0ng.openidea\settings.toml`
- Linux: `~/.config/ai.l0ng.openidea/settings.toml`
3. The project file, `<project>/.openidea/settings.toml`, written when you save a page with **This project** selected.
A file holds only the values that differ from the layer below. Tables merge key by key; a value or array in a higher layer replaces the lower one entirely (for example, setting `files.exclude` in a project replaces the global list).
Some settings are ignored in the project file: `mcpServer` and imported color schemes (`editor.customSchemes`) are global only. Project trust is never read from settings.
## File format
The files are TOML. Keys use the camelCase names shown below; sections group them:
```toml
keymap = "intellij-windows"
[appearance]
theme = "dark"
zoom = 110
[editor]
fontFamily = "JetBrains Mono"
fontSize = 14
[files]
exclude = ["**/.git", "**/node_modules", "**/target", "**/dist"]
```
- OpenIDEA keeps your comments and formatting when it writes a file.
- If a file can't be parsed, or a value has the wrong type, that whole file is ignored and a warning is written to the [log](/en/reference/data-directories#logs). The other layers still apply.
- OpenIDEA reads the files when a window loads its settings. After editing a file by hand, restart OpenIDEA (or reopen the project) to be sure the change is picked up.
## Settings pages
| Group | Pages |
| ---------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Appearance & Behavior | Appearance; System Settings (Language and Region, Date Formats, HTTP Proxy, Updates); Notifications |
| Keymap | Keymap |
| Editor | General (Auto Import, Appearance, Breadcrumbs, Code Completion, Code Folding, Editor Tabs, Gutter Icons, Inline Completion, Postfix Completion, Rich-Text Copy, Smart Keys, Sticky Lines); Code Editing; Font; Color Scheme; Code Style; Inspections; Natural Languages (Spelling); File and Code Templates; File Encodings; Live Templates; File Types; Inlay Hints; TODO; Vim |
| Plugins | Plugins |
| Version Control | Commit; Confirmation; Directory Mappings; Issue Navigation; Log; Shelf; Git; GitHub |
| Build, Execution, Deployment | CMake; Gradle; Maven; Console; Debugger (Data Views, Stepping); Python Debugger; Run/Debug; Run Targets; Deployment (Options) |
| Languages & Frameworks | Language Servers; Go (Build Tags, Go Modules); Java; Markdown; Node.js; PHP; Python Interpreter; Prettier; oxfmt; Ruff; Ruby; Rust; TypeScript |
| Tools | Agents (Chat); Terminal; Actions on Save; External Tools; SSH Configurations; MCP Server |
| Security | Project Trust |
Installed plugins can add pages, and file icon themes with options add one each. Plugin settings are stored under `[plugins.<plugin-id>]`.
## Common keys
### Top level
| Key | Default | Description |
| ----------------- | ------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `keymap` | `intellij-macos` on macOS, `intellij-windows` elsewhere | Active keymap: `intellij-macos`, `intellij-windows`, `vscode-macos`, `vscode-windows`, `eclipse-macos`, `eclipse-windows`, or the id of a custom keymap. |
| `keymapOverrides` | empty | Action id → list of shortcuts on top of a bundled keymap; an empty list unbinds. See [Keymaps](/en/guide/keymap). |
| `customKeymaps` | empty | Keymaps you created: `name`, `parent`, `overrides`. |
### `[general]`
Settings › Appearance & Behavior › System Settings, unless noted.
| Key | Default | Description |
| ---------------------------- | -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------- |
| `reopenLastProject` | `true` | **Reopen projects on startup**. |
| `openProjectIn` | `"ask"` | Where **Open…** puts a project while another is open: `ask`, `new` (new window), `same` (current window) or `attach` (add to the current project). |
| `defaultProjectDirectory` | `""` | Starting folder of the Open and Clone dialogs; empty uses the OS default. |
| `saveOnIdle` / `idleSeconds` | `false` / `15` | **Save files if the IDE is idle for** the given number of seconds. |
| `confirmExit` | `true` | **Confirm before exiting the IDE**. |
| `closeWithoutWelcome` | `false` | **Close the window instead of showing the Welcome screen**. |
| `closeTabsWithWindow` | `false` | **Close all editor tabs when the window closes**. |
| `powerSaveMode` | `false` | **File › Power Save Mode**: no automatic popups or background highlighting. |
| `autoCheckUpdates` | `true` | **Check for updates automatically** (Updates page). |
| `updateSource` | `"auto"` | **Update source**: `auto`, `github` or `cnb`. |
| `dateFormat.overrideSystem` | `false` | **Override system date and time format** (Date Formats page). |
| `dateFormat.pattern` | `"dd.MM.yyyy"` | Date pattern with `dd`, `MM`, `MMM`, `yy`, `yyyy`. |
| `dateFormat.use24Hour` | `true` | 24-hour time. |
| `dateFormat.pretty` | `true` | "Today", "Yesterday", "5 min ago". |
### `[appearance]`
Settings › Appearance & Behavior › Appearance, unless noted.
| Key | Default | Description |
| -------------------------------------------- | -------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `theme` | `"light"` | `light` (Islands Light), `dark` (Islands Dark), `dark-hc` (High Contrast), `solarized-light`, `solarized-dark`, `one-light`, `one-dark`, or a plugin theme as `plugin:<plugin-id>/<theme-id>`. |
| `syncWithOs` | `false` | **Sync with OS**. |
| `preferredLightTheme` / `preferredDarkTheme` | `"light"` / `"dark"` | Themes used with **Sync with OS**. |
| `accent` | `"#3871e1"` | **Accent colour**. |
| `fileIconTheme` | `""` | A plugin's file icon theme as `<plugin-id>/<theme-id>`; empty uses the built-in icons. |
| `zoom` | `100` | **Zoom**, in percent (50 to 300). |
| `useCustomFont` | `false` | **Use custom font:** apply `uiFontFamily` and `uiFontSize`. |
| `uiFontFamily` / `uiFontSize` | `"Inter"` / `13` | UI font. |
| `uiFontFallback` | `""` | **UI fallback font**. |
| `contrastScrollbars` | `false` | **Use contrast scrollbars**. |
| `redGreenVision` | `false` | **Adjust colors for red-green vision deficiency**. |
| `compactMode` | `false` | **Compact mode**. |
| `showMainToolbar` / `showStatusBar` | `true` / `true` | **Show main toolbar**, **Show status bar**. |
| `navigationBar` | `"statusBar"` | **Navigation bar**: `top`, `statusBar` or `hidden`. |
| `mainMenuStyle` | `"hamburger"` | **Main menu**: `hamburger` or `merged` (with the main toolbar). |
| `ideAntialiasing` / `editorAntialiasing` | `"greyscale"` | `subpixel`, `greyscale` or `none`. |
| `locale` | `"en"` | **Language** (Language and Region page): `en`, `zh`, `ko`, `fr`, `pl`, `pt`, `es`. |
### `[editor]`
| Key | Default | Description |
| ---------------------------------------- | -------------------------------- | ------------------------------------------------------------------------------------------------------ |
| `fontFamily` / `fontSize` / `lineHeight` | `"JetBrains Mono"` / `13` / `22` | Editor › Font. |
| `ligatures` | `false` | **Enable ligatures**. |
| `fallbackFont` | `""` | **Fallback font**. |
| `fontWeight` / `boldFontWeight` | `400` / `700` | **Main font weight**, **Bold font weight**. |
| `colorScheme` | `"theme-default"` | Editor color scheme; `theme-default` follows the UI theme, otherwise a theme id or an imported scheme. |
| `semanticHighlighting` | `false` | **Semantic highlighting** (Color Scheme › Language Defaults). |
| `rainbowBrackets` | `false` | **Rainbow brackets** (Color Scheme › Language Defaults). |
| `tabSize` / `insertSpaces` | `4` / `true` | Default tab size, and whether indentation uses spaces. |
| `softWrap` | `true` | Soft-wrap the files matching `general.softWrapFiles` (`*.md; *.txt; *.rst; *.adoc` by default). |
| `showWhitespace` | `false` | **Show whitespaces**. |
| `stickyScroll` | `true` | **Show sticky lines while scrolling**. |
| `inlayHints` | `true` | Show inlay hints. |
| `formatOnSave` | `false` | Reformat code on save (Tools › Actions on Save). |
Sub-tables such as `[editor.general]`, `[editor.appearance]`, `[editor.completion]`, `[editor.tabs]`, `[editor.codeStyle]` and `[editor.encodings]` hold the options of the matching Editor pages.
### `[files]`
| Key | Default | Description |
| ------------------------ | --------------------------------------------- | ------------------------------------------------------------------------------------------------------------------ |
| `autoSave` | `true` | **Save files when switching to a different application or a built-in terminal**. |
| `syncOnFocus` | `true` | **Synchronize external changes when switching to the IDE window**. |
| `exclude` | `["**/.git", "**/node_modules", "**/target"]` | **Exclude patterns** (Editor › File Types): globs hidden from the project tree and skipped by search and indexing. |
| `ignoredNames` | a built-in list | **Ignore files and folders**: names hidden everywhere, such as `.DS_Store`. |
| `trimTrailingWhitespace` | `true` | Remove trailing spaces on save. |
| `ensureFinalNewline` | `true` | End every saved file with a line break. |
| `localHistoryDays` | `5` | **Keep local history for** this many days with changes. |
| `localHistoryMaxMb` | `512` | **Maximum local history size per project**, in MB. |
### `[notifications]`
| Key | Default | Description |
| --------------------------- | ----------- | ------------------------------------------------------------ |
| `balloons` | `true` | **Display balloon notifications**. |
| `sound` | `false` | **Play sound**. |
| `groups.<group-id>.display` | `"balloon"` | Popup type per group: `balloon`, `sticky` or `none`. |
| `groups.<group-id>.log` | `true` | Also list the notification in the Notifications tool window. |
### `[terminal]`
Settings › Tools › Terminal.
| Key | Default | Description |
| ---------------------------------------- | ------------------ | ------------------------------------------------------------------------------ |
| `shellPath` | `""` | Shell command line; empty starts your login shell. |
| `startDirectory` | `""` | Start directory; empty is the project root, relative paths resolve against it. |
| `env` | empty | Extra environment variables. |
| `tabName` | `"Local"` | Name of new tabs. |
| `useEditorFont` | `true` | Use the editor font; otherwise `fontFamily`, `fontSize`, `lineHeight`. |
| `overrideIdeShortcuts` | `true` | Let the shell receive keys that are also IDE shortcuts. |
| `escapeToEditor` | `false` | Escape moves focus to the editor instead of reaching the shell. |
| `optionAsMeta` | `false` | Use Option as Meta (macOS). |
| `copyOnSelection` / `pasteOnMiddleClick` | `false` / `true` | Clipboard behaviour. |
| `cursorShape` / `cursorBlink` | `"block"` / `true` | `block`, `underline` or `bar`. |
### `[proxy]`
Settings › Appearance & Behavior › System Settings › HTTP Proxy. Used by the IDE's own downloads, the updater and the HTTP client; with a manual proxy, processes started by the IDE get `HTTP_PROXY`, `HTTPS_PROXY` and `NO_PROXY`.
| Key | Default | Description |
| ------------------------ | -------------- | --------------------------------------------------------------------------------------------- |
| `mode` | `"auto"` | `none` (direct), `auto` (the system's `HTTP_PROXY` / `HTTPS_PROXY` / `NO_PROXY`) or `manual`. |
| `kind` | `"http"` | `http` or `socks`. |
| `host` / `port` | `""` / `80` | Proxy address. |
| `noProxy` | `""` | Hosts reached directly, comma-separated; `*` matches any characters. |
| `authenticate` / `login` | `false` / `""` | Proxy credentials. The password is kept in the saved passwords, not in `settings.toml`. |
### Other sections
| Key | Description |
| ------------------------------------------------ | -------------------------------------------------------------------------------------------------------------------------------- |
| `[actionsOnSave]` | `optimizeImports`, `cleanup` (Tools › Actions on Save). |
| `[mcpServer]` | `enabled`: serve the IDE's tools to agents on 127.0.0.1 (Agents › IDE MCP Server, global only). See [MCP server](/en/guide/mcp). |
| `[agents]` | What agent task headers show (Tools › Agents › Chat). |
| `[languages]` | Interpreters, SDKs and options per language, e.g. `[languages.java]`, `[languages.python]`, `[languages.go]`. |
| `[languageServers]` | Per language server, by name: launch and protocol options, or a server defined here. |
| `[tools]` | Language servers and debug adapters at a location you chose, by command name. |
| `[vcs]`, `[console]`, `[debugger]`, `[run]` | Version Control, Console, Debugger and Run/Debug pages. |
| `[inspections]`, `[spelling]` | Editor › Inspections, Editor › Natural Languages › Spelling. |
| `[ssh]`, `[deployment]`, `runTargets`, `[cmake]` | SSH Configurations, Deployment, Run Targets, CMake. |
| `[projectStructure]` | Source, test, resource and excluded folders (Project Structure). |
| `externalTools` | Tools › External Tools entries. |
| `[plugins.<plugin-id>]` | Settings that plugins declare. |
The complete list of keys and their defaults is in the source: [`crates/ide-core/src/settings.rs`](https://github.com/l0ng-ai/openidea/blob/main/crates/ide-core/src/settings.rs) and the other `*_settings.rs` files next to it.
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