How to set up a WordPress child theme?
Without question, the best way to customize files in a WordPress theme is with a child theme. That way, you’ll have an easier time updating the parent theme when an update is released. Adding your CSS code to a child theme ensures that you won’t lose it during a theme update.
To help you create a child theme, we’ve written a series of posts on the Organized Themes Blog that you can use as a guide. Here are the links to the tutorial blog posts:
If you have any questions about creating a child theme, feel free submit a support request.