First thing you need to do is go to Appearance -> Theme File Editor
On the right locate file called functions.php
Paste the code below in this box:
To change logo url you need to use this code.
PHP
add_filter('blocksy:header:logo:url', function ($home_page) {
return 'https://my-custom-url.com';
});NOTE: Replace the https://my-custom-url.com with your URL.
Click Save:
