Currently the Campaign page customizer has an option to choose between the Default ("Main website navigation") and the Minimal navigation. The new customizer would introduce two changes:

• a new wording (See screenshot): Main website navigation / Separate from the main website
• only choosing the Separate from the main website would allow editors to use further customization options, if they choose the main website navigation then the default theme is available only
• note that the color options under the Navigation customizer would move under the Theme customizer so it needs to be disabled in this section