Online theme customizer missing details

Okay, so after a bit more searching, I came through a simple fix for my problem: Clear cache and Refresh page I still don’t get why it behaves this way. If anyone knows, please comment on this reply. Thanks

Functions in custom theme

Using functions.php Unlike style.css, the functions.php of a child theme does not override its counterpart from the parent. Instead, it is loaded in addition to the parent’s functions.php. (Specifically, it is loaded right before the parent’s file.) In that way, the functions.php of a child theme provides a smart, trouble-free method of modifying the functionality … Read more