You can append additional CSS for each individual Theme CSS. The code is available for editing from within the Code tab.
The additional code entered is appended to the end of the global style sheet. If you add CSS to this tab and do not modify the code on the Style Variables or Style Sheet tabs, then you are not locked from editing that theme in Theme Manager.
Note: A separate custom CSS file exists for each theme.
To append additional CSS for a Theme CSS:
Open the Design page and click Code.
Scroll down to view the Theme CSS options and select the one you want to edit.
The design code window for that Theme CSS opens.
Click the Additional CSS tab.
Immediately above the menu tabs is the Expand Editor icon which allows you to view full screen mode.
Modify the code, as required.