Click Scale Layout to automatically scale the content within the dotted frame to the width of your visitor’s browser window. You can limit the maximum width of scaling by typing the numeric value in the range from 1024px to 8400px. Only the content that fits within the dotted frame will be visible.
Projects with Scale Layout enabled are automatically scaled in the Editor mode. This makes the design process easier, guaranteeing a project will look the same during the editing and after publication.
Note: This attribute applies only to the Desktop layout. In Firefox, Scale Layout won't be visible in the Editor mode.