Child theme gives you the possibility that when you are customizing the theme as you want, you can update the theme without missing the changes. A child theme ensures that all your customizations will not be overwritten even when you update the parent theme. Without child theme, you need to get backup from the theme and its files’ changes and replace theme in each update. But if you put these codes in child theme, there is no need to replaced the changed files. You can put them in child theme and update the theme easily. (We always recommend to get a backup).Read More about child theme
To activate the child theme, follow the instructions as for activating for the theme: https://webnus.net/deep-premium-wordpress-theme-documentation/install-deep-theme/
Please note: You need to have the main theme installed, and then activate install the child theme.
While child theme is a great option to add the customization codes to deep theme, you need to consider that if the customization codes impact and causes some difficulties and issues in your CMS System performance, this will be out of Webnus support. You can check Envato support rules here: This Link
No1: Go to download panel and download Deep Theme package completely. (This zip file contains child theme documentation main theme DummyContent folder)
No2: Install deep_child_theme.zip from WordPress Admin > Appearance > Themes > Add New and activate it. Or, via FTP or CPanel go to the directory Public_html / wp-content / themes and upload and extract the zip file there, then go to WordPress Admin > Appearance > Themes and activate child theme.
It should be noted that child theme activates when the parent theme is installed, if you don’t have it, you can get it from here: https://webnus.net/deep-premium-wordpress-theme-documentation/install-deep-theme/
Related Link For Child theme :