Now I have a child theme in WordPress. If I want to make additions in theme level. What I will do? Change in Child Theme function. php or theme’s functions.php
Right now, I’m confuse at what point I have to start?
Should I start to work on child theme file?
Yes. You should start to work on the child theme file. The WordPress Documentation explains how to use the functions.php file in your child theme. It says to add a PHP function to your theme, you should add the function to the functions.php of your child theme. This WordPress page on Child Themes will help you to understand the relationship between parent and child themes.