Thanks for your response.
I have to say that I’m now confused about the changes I made. As the only location where setup-cbox.php and sidebars-cbox.php existed in was /public_html/wp-content/themes/cbox-theme/engine/includes/, I had made the changes there (to the existing files in the parent theme).
So a few moments ago I reversed the changes and restored the original setup-cbox.php and sidebars-cbox.php files which I had kept a copy of and move the modified files across to my child theme at /public_html/wp-content/themes/causeaustralia/engine/includes/.
But now my causeaustralia subsite has no Site Feature option in the dashboard which had been resolved in an earlier fix … so I’m now plain confused as to what I should do.
I didn’t get an answer to my question a while ago as to whether I should modify the parent theme’s setup-cbox.php and sidebars-cbox.php files or establish new ones in the child theme, and, because I was able to access the Site Feature in my causeaustralia subsite I though the fix was a good one and assumed that I had done the right thing.
It looks to me now that I need to go back to what I originally did … modify the setup-cbox.php and sidebars-cbox.php in the /public_html/wp-content/themes/cbox-theme/engine/includes/directory … but I might wait in case I get further directions.
Thanks, and best regards … Michael