Implement phone responsive design by reworking desktop-only views and layouts.
This means making sure all parts of the app are phone-responsive, most notably:
The navigation bar must be made into a menu bar with the title and version, but the menu links are accessible through a dropdown menu/sandwich icon.
The editor must have a layout where the editor is on top of the render preview. How the slide preview should be implemented is somewhat of a tricky question, but there could be potentially interesting designs possible for phones.
All forms and popups must be properly adjusted to the screen size.
Editor Preview full-screen should be hidden/disabled, as it doesn't serve any purpose on phones/small screens.
Implement phone responsive design by reworking desktop-only views and layouts.
This means making sure all parts of the app are phone-responsive, most notably: