Customize smarty templates, css styles and icons
Please see: Customizing Themes, edit templates and edit css

Customize JavaScript
Add your custom JavaScript to `styles/stylename/custom.js` or `styles/stylename/options/optionname/custom.js`

Customize language files

Add your custom language strings to:
lang/**/custom.php
where ** is the language code.

More info: i18n

Customize profiles

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