This document provides instructions for customizing the JSN Dome template for Joomla. It includes how to edit CSS files and elements on webpages, configure the website title, translate the template to other languages, work with icons, modify general layout settings, and customize various sections like the header, menu, and footer. The document gives an overview of the template's CSS files and outlines how to find and modify specific styles. It also provides best practices and tools to facilitate the customization process.