Preferences

Themes sets a color theme for DevTools UI.

Themes:

• System preference
• Light
• Dark

Panel layout arranges panes in panels.

Affects Elements > Styles and sister tabs, and the Sources > Debugger pane. The auto option makes the layout depend on DevTools width.

Panel layout:

• horizontal
• vertical
• auto

Language sets the locale for DevTools UI.

To apply this setting, reload DevTools.

Language:

• Browser UI language
• One of locale options, in this example, Chinese

Enable Ctrl/Cmd + 0-9 shortcut to switch panels lets you open panels using the keyboard.

This video shows how to switch between the tabs using the corresponding keyboard shortcuts.

Disable paused state overlay hides the Paused in debugger overlay in the viewport when code execution is paused.

Show What's New after each update automatically opens the What's New drawer tab after each Chrome update.

Search in anonymous and content scripts lets you search all loaded JavaScript files, including those in Chrome extensions, using the Search tab.

This video shows how to search for text in an extension source file.

Automatically reveal files in sidebar selects files on the Sources > Page pane when you switch between tabs in the Editor.

This video shows how, with this option enabled, the Sources panel selects files in the navigation tree as you switch between tabs.

Enable JavaScript source maps lets DevTools find sources of generated or minified JavaScript files.

Enable tab moves focus makes the Tab key move focus inside DevTools instead of inserting a Tab character in the Editor.

Requires to reload DevTools.

This video first shows Tab characters inserted with the Tab key. Then when you enable this option and reload DevTools, the Tab key moves focus.

Detect indentation sets indentation to the one in the source file opened in the Editor.

Requires to reload DevTools.

This video first shows the default indentation of eight spaces. Then when you enable this option, it overrides the default indentation to that of the source file.

Autocompletion enables handy suggestions in the Editor.

This video first doesn't show any suggestions. Then when you enable this option, the Editor shows suggestions for command completion.

Auto bracket closing automatically adds a closing bracket or tag when you type an opening one.

This video shows typing opening brackets before and after enabling automatic bracket closing.

Bracket matching underlines and highlights in light red in the Editor a square bracket, curly bracket, or parenthesis without a pair.

Code folding lets you fold and unfold code blocks in curly brackets in the Editor.

Requires to reload DevTools.

This video shows how to fold code blocks when you enable this option.

Show whitespace characters displays whitespace characters in the Editor.

Requires to reload DevTools. Options do the following:

• All denotes all whitespace characters as dots (...). Additionally, the Editor denotes the Tab character as a line (—).
• Trailing highlights whitespace characters at the end of lines in light red.

Show whitespace characters:

• None
• All (...)
• Trailing

Display variable values inline while debugging shows you the variable values next to assignment statements while the execution is paused.

Focus Sources panel when triggering a breakpoint opens Sources > Editor at the line with the breakpoint that paused execution.

This video first shows the Sources panel out of focus when paused at a breakpoint. Then when you enable this option, DevTools opens the Editor in the Sources panel and shows you the line of code with the breakpoint.

Automatically pretty print minified sources makes those sources readable.

When pretty-printed, the Editor may show a single long code line in multiple lines, preceded by - to indicate that it's a line continuation.

Enable CSS source maps lets DevTools find the sources of generated CSS files, for example, .scss, and show them to you.

Allow scrolling past end of file lets you scroll further than the last line in the Editor.

This video shows you how to scroll past the end of file when you enable this option.

Allow DevTools to load resources, such as source maps, from remote file paths. Disabled by default for security reasons.

If left disabled, DevTools logs to the Console messages similar to the following:

Default indentation lets you choose the number of spaces the Tab key inserts in the Editor.

Default indentation:

• 2 spaces
• 4 spaces
• 8 spaces
• Tab character

This example shows how to set the default indentation to eight spaces first and then to a Tab character.

Show user agent shadow DOM displays shadow DOM nodes in the DOM tree.

Word wrap breaks long lines in the DOM tree and wraps them to the next line.

Show HTML comments displays HTML comments in the DOM tree.

Reveal DOM node on hover selects the corresponding node in the DOM tree as you hover over an element in the viewport in inspect mode.

This video first shows that DOM nodes aren't selected in the DOM tree. Then when you enable this option, the Elements panel selects the nodes on hover.

Show detailed inspect tooltip displays the tooltip in the viewport in inspect mode as you hover over an element.

Show rulers on hover displays the rulers in the viewport as you hover over elements in the DOM tree.

Show CSS documentation tooltip displays a tooltip with a short description when you hover over a property in the Styles pane.

The Learn more link takes you an MDN CSS Reference on the property.

Preserve log is the same as Preserve log in the Network panel. Saves requests across page loads.

This video first shows the requests log refreshed on page reload, then persisted when you enable this option.

Record network log is the same as Record network log in the Network panel. Starts or stops recording requests in the network log.

Enable network request blocking blocks requests that match patterns in the Network request blocking drawer.

This video first shows that the requests aren't blocked. Then, after you enable this option, a pattern in the Network request blocking drawer blocks them.

Disable cache (while DevTools is open) is the same as Disable cache in the Network panel. Disables browser cache.

Allow to generate HAR with sensitive data adds options to the downloadExport HAR button that let you export with or without sensitive data (sanitized).

Sensitive data is the data in Cookie, Set-Cookie, and Authorization headers.

Color-code resource types highlights requests in different colors depending on their type in the Waterfall column of the network log.

Group network log by frame is the same as Group by frames in the Network panel. This option groups requests initiated by inline frames.

Force ad blocking on this site blocks detected ads on the page while DevTools is open.

Flamechart mouse wheel action assigns scroll or zoom action to your mouse wheel when you navigate the flame chart.

Flame chart mouse wheel action:

• Scroll
• Zoom

This example shows both scroll and zoom mouse wheel actions on a flame chart in the Performance panel.

Hide network messages hides network messages in the Console.

This video shows how to hide network messages with this option both in Settings and in Console Settings.

Selected context only makes the Console show messages only for the selected context: top, iframe, worker, or extension.

This video shows how to enable this option both in Settings and in Console > Settings and select the context in the Console.

Log XMLHttpRequests makes the Console log XHR and fetch requests.

This video shows how to enable this option both in Settings and Console > Settings and log the XHR finished loading messages to the Console.

Show timestamps makes the Console show timestamps next to messages.

Autocomplete from history makes the Console suggest commands you ran earlier as you type.

You can find the same option in Console > Settings.

Accept autocomplete suggestion on Enter makes the Console accept the selected suggestion from the autocomplete drop-down when you press Enter.

This video shows what happens when you press Enter before and after enabling this option.

Group similar messages in console makes the Console group similar messages together.

You can find the same option in Console > Settings.

Show CORS errors in console makes the Console show the CORS errors it logged.

You can find the same option in Console > Settings.

Eager evaluation makes the Console show a preview of an output as you type a command.

You can find the same option in Console > Settings.

This video shows various output previews.

Treat code evaluation as user action turns any command you run in the Console into user interaction.

In other words, it sets navigator.userActivation.isActive to true upon evaluation. You can find the same option in Console > Settings.

This video shows the evaluation result of navigator.userActivation.isActive before and after enabling this option.

Automatically expand console.trace() messages makes the Console display expanded console.trace() messages when it logs them.

Preserve log upon navigation makes the Console log a Navigated to message upon every navigation and save logs across all pages.

You can find the same option in Console > Settings.

Link handling sets an option to open files with when you click a link to a source file, for example, in the Elements > Styles pane.

Link handling:

• Auto. Opens files in the Sources panel by default.
• Arbitrary option that can be added by a DevTools extension.

Enable local overrides makes DevTools persist changes you make to sources across page loads.

For more information, see Local Overrides.

Disable JavaScript lets you see how your web page looks and behaves when JavaScript is disabled.

Reload the page to see if and how the page depends on JavaScript while loading.

When JavaScript is disabled, Chrome shows the corresponding icon in the address bar and DevTools shows a warning icon next to Sources.

Disable async stack traces hides the "full story" of the async operation in the Call Stack.

By default, the Debugger tries to trace async operations if the framework you're using supports such tracing.

For more information, see View async stack traces.

Auto-open DevTools for popups opens DevTools when you click links that open new tabs. That is, all links with target=_blank.

This video first shows how to click a link and open a new tab *without* DevTools. Then when you enable this option, a new tab opens *with* DevTools.

Search as you type makes DevTools "jump" to the first search result as you type your search query. If disabled, DevTools takes you to the result only when you press Enter.

This video first shows how DevTools "jumps" as you type a search query. Then when you enable this option, DevTools takes you to the first result when you press Enter.

Enable settings sync lets you sync DevTools settings across multiple devices.

To use this setting, first enable Chrome Sync. For more information, see Sync settings.