Only allow changes in Desktop header to impact all pages. Editing the header in other displays such as tablet or mobile shouldn't impact the alignment on the Desktop version. It creates an unnecessary battle with resizing between versions.
Thank you for your feedback. We share your view about maintaining header content hierarchy, however would like to highlight a change we have applied lately and is relevant to your idea:
Originally, each page on Webydo Studio contained header and footer sections, separated from the main content area by flexible horizontal dividers.
After implementing the Responsive Studio and considering our users requests, we found that the header divider is no longer helpful – and this feature no longer exist in new projects.