Child themes are the recommended way of modifying a WordPress theme. In most our themes we enable you to create and activate a child theme with just one click.
To do so, in the themes that support this feature (please refer to theme documentation) in your Dashboard go to Appearance → Theme Editor.
In the top you will see a notification that will invite you to create and activate a child theme. Just click Activate Now link.
The child theme folder and necessary files will be created automatically in less than a second, and the child theme will also be activated automatically.