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As you make your Joomla! site using the extension you will control the details of the display using parameters. Parameters control everything from whether the author's name is displayed to who can view what to the number of items shown on a list.
Default parameters for each components are changed using the Options button on the component toolbar.
Parameters can also be set on an individual item, such as an article or contact and in menu links.
If you are happy with how your site looks, it is fine to leave all of the parameters set to the defaults that were created when your site was installed. As you become more experienced with Joomla! you will use parameters more.
Using Joomla!
With Joomla! You can create anything from a simple personal website to a complex ecommerce or social site with millions of visitors.
This section of the sample data provides you with a brief introduction to Joomla! concepts and reference material to help you understand how Joomla! works.
When you no longer need the sample data, you can can simply unpublish the sample data category found within each extension in the site administrator or you may completely delete each item and all of the categories.