Code Style. PostCSS
On this page:
The page is available only when the PostCSS repository plugin is installed and enabled. The plugin is not bundled with WebStorm, but it can be installed from the JetBrains plugin repository as described in Installing, Updating and Uninstalling Repository Plugins and Enabling and Disabling Plugins.
Tabs and Indents
The link appears in the upper-right corner of the page, when applicable. Click this link and choose the language to be used as the base for the current language code style.
To return to the initial set of code style settings and discard the changes, click Reset.