Themes
Under the "Themes" menu item, you can create new system-wide themes and display them for all customers. This means that these themes are available in all customer-accounts.
Create or edit the desired theme and then distribute it to all your users using the blue "Distribute theme" button.
The editing screen is the same as the one available in the accounts under Themes. Further explanations can be found here: Edit themes
Create theme
Click on the button to open the following screen.
Here you can make all relevant settings relating to the themes. The details of the individual areas are explained in the Theme in the Cookie & Co. Administration.
Distribute themes
Clicking on this button distributes the theme or the changes in existing themes to all domains.
Please note that these changes are then immediately live.