2) Install the child theme, the installing progress is same with installing a normal theme, the installable file is “air-child.zip”. Activate child theme after installed.
4) If you want to change some PHP files: header.php, footer.php, single.php, page.php, comments.php, searchform.php and PHP files in the template folder, please clone the PHP file, move the cloned PHP file into child theme folder. Please make sure the same folder tree with the parent theme. Like:
You can change the cloned files into child theme folder.
Do you mention the name in wp-admin, you need to edit the style.css, change the “Theme Name”.
No, it doesn’t work by changing zip file name. Please change the child theme folder name. It is not necessary, the child theme folder is only shown in origin HTML code
PS: don’t change the parent theme folder name