The first release candidate version of Joomla! 4 has been released on June 13, 2021. The RC4 is aimed at extension and template developers to encourage them to work with this release in order to prepare extensions for the stable release of Joomla! v.4.0.

The official announcement about this Joomla! release is here.

Easily enable or disable page sections. Click the handle icon on the right in the section.The disabled element will still exist on the backend, but users will not see them on the live site.


 

There is also a module called 'ui/Theme-Builder Components' that is automatically installed with the package. You can use this module to put your content anywhere in your page.