Hi Angus, Hope this isn't too late for you! When a .HTML email is
uploaded on Adobe Campaign Standard (ACS), there are two ways it might
be imported: either using the in-built editor, or copy-pasted into the
HTML view of the ACS editor. You can upload your own HTML content to the
Email Designer. If it hasn’t been created through Email Designer, it
will load in compatibility mode which is designed to keep your original
HTML but limits certain edition capabilities through the UI (such as the
navig...