I am trying to add a text box widget to the Contact page template on Sydney Pro - but anytime I add anything to that page layout, it doesn’t show up on the actual page. How do I add a simple HTML box where I can add content and an image to an already existing page template?
I don’t think that there is an easy way to do it. It looks like you have to edit
page-templates/page_contact.php file and override it in a child theme (in order to avoid losing your modifications after theme update). Also you can try to recreate your Contact page using Page Builder instead of Contact page template.
Please feel free to ask any other questions that you might have.
Kind Regards, Roman.