How to add copyright in footer and remove Proudly powered by WordPress

Hi 1999compaq

1. Create Child Theme

https://www.ads-software.com/support/topic/child-theme-stylesheet-not-loading?replies=10

2. edit functions.php

add_filter('quest_footer_copyright_text', 'my_quest_footer_copyright_text', 10, 1);
function my_quest_footer_copyright_text( $text ){

	return "your message";
}

Thank you Takashi, this is the correct solution