There are a few steps you'll need to take, to switch parent themes.
Create a Backup of the Original Child Theme
If you have FTP access, log into
[root]\wp-content\themes\ and download the child theme folder to your your computer.
Copy and rename the entire child theme folder. This will be your new child theme.
If you don't have FTP access, it's probably best to start from scratch. And then use the theme uploader, to add it to your website, once it's built.
Edit the CSS File in Your New Child Theme
At a minimum, you should change the "Theme Name", "Template" and
@import lines. Here's a suggested edit:
Theme Name: Tesseract Child Proto-Vest
Description: Child Theme Used to Style Proto-Vest
Author: Eva Berrios
Replace "PARENT_THEME_FOLDER_NAME" with the actual folder name of the Tesseract theme.
Note: the template line is case sensitive.
You may also find this answer helpful: How to create child theme with Tesseract theme?.
Advanced: Review Functions.php in Your New Child Theme
If you know how to code in PHP and how use WordPress hooks and filters, you should review any custom functions in your child theme. This isn't essential, but it will help you troubleshoot, if certain customizations don't carry over to your new theme.
If you don't know PHP, it's best to just leave that file alone. Any functions that refer to specifically to the Responsive theme will just stop working, but shouldn't break your site.
Upload Your New Child Theme and Activate
If using FTP, upload your new theme folder to
Otherwise, you'll need to use the built in theme uploader. Here's a good tutorial.
Activate your Child Theme by going to Appearance --> Themes and choosing your new theme.