This theme is integrated well with Visual Composer ( a premium page builder plugin costs $45, included for FREE with this theme.) page builder plugin to create content with Drag and Drop interface.
Find out more about that plugin here https://wpbakery.com/
Here is quick start guide...
- To create/edit a page.. Go to Pages ( add new or edit ) and then click Add Element button.
The theme comes with some custom created Visual composer elements also, that you can find in the Tab with name of the theme. In this case Craftio Tab
Note: If you need, Documentation for the plugin can be found here https://kb.wpbakery.com/