Joomla! Documentation™

1. Open Settings (CTRL-ALT-S / CMD-,)
2. Go to Languages & Frameworks
3. Click on PHP
4. Click on Code Sniffer
5. The configuration is set to Local by default
6. Click on the 3 dots behind it to open the configuration screen
7. The first option is the PHP Code Sniffer (phpcs) path
8. Click on the 3 dots behind the path to select the location of the phpcs file. See above on where phpcs may be installed on your site
9. Click on Validate to make sure the path is correct and phpcs is working
10. Click OK