In PrestaShop, you can remove the default trademark, social, and other links from the back-office footer by modifying the template files.
Here are the steps to remove the links from the back-office footer:
Log in to the back office of your PrestaShop website.
Go to the “Advanced Parameters” menu, and select “Performance”.
On the “Performance” page, you will see a section called “Debug mode” with a checkbox to enable it. Check the checkbox to enable the debug mode.
Now access the back-office footer and look for the links you want to remove.
Open the file located in themes/default-bootstrap/template/footer.tpl in a text editor.
Look for the code that displays the links you want to remove and delete them.
Save the file and upload it back to your server, overwriting the old file.
Clear the cache of your store and refresh the page. The links should be removed now.
Note: Before making any changes to the template files, it’s always a good idea to make a backup of the original file, in case something goes wrong.
Also please note that these changes will be lost if you update the theme or if you change the theme of your store.