Hello @hansvjensen,

As for the query about placing the code under Appearance> Editor, you can definitely place the code here but in case if there is any mistake then the whole site will break down. So it not the best idea to paste the custom code under this option.

So as we have previously mentioned that is always the best idea to use the child theme for any code customization.This is useful if you want to make changes to your theme without worrying about your changes being erased when the theme updates.

Also, in your case make sure you have activated the child theme from your dashboard. After successfully creating the child theme from your Admin dashboard, Using an FTP you can edit the child theme functions.php file.The functions.php file is inside the child theme that you have created through the dashboard.

Hope this helps.

Best Regards!!

Hello @hansvjensen,

The white border is not seen on the front page because the border is in black color. Now to overwrite the color of the border and make it visible in frontend use below given CSS in Additional CSS.

div#sidebar-front-page-widget-area aside.widget {
    border-bottom: 1px solid #fff !important;
}

Hope this helps.

Let us know if you have any confusion further.

Best Regards!!

Have a good day 🙂 .