Thanks for writing in! Please follow our child theme setup guide here (https://theme.co/apex/forum/t/setup-how-to-setup-child-themes/57). Then you can copy the template customizations in your parent theme to the respective path of your child theme.
If you have edited the _content.php file in your parent theme (x/framework/views/global/), you can copy the file into your child theme's respective location after setting up your child theme as follows (x/framework/views/global/_content.php).
Hope that's clear.