You can copy/paste the whole Global Classes & Stylesheets tab, as well as the global classes and stylesheet tabs, as well as individual global classes and stylesheets.
Global Classes & Stylesheets tab
Allows you to copy/paste the tab.
Copy/Paste
Navigate to the Global Classes & Stylesheets tab
Select right-click on said tab
Select Copy or Paste
Global Classes tab
Allows you to copy/paste the Global Classes tab.
Copy/Paste
Navigate to the Global Styles tab
Find the Global Classes tab
Select right-click
Select Copy All/Paste or Replace All
Global Stylesheet tab
Allows you to copy/paste the Global Stylesheets tab.
Copy/Paste
Navigate to the Global Styles tab
Find the Global Stylesheets tab
Select right-click
Select Copy All/Paste or Replace All
Global Class
Allows you to copy/paste individual Global Classes.
You can also Duplicate Global Classes, which creates a clone of the duplicated class.
Copy Element VS. Style
When hovering over the Copy icon, you will see two ways to copy a Global Class: element and styles.
Element Copies the class itself.
Styles Copies the class' style in order to apply to another block
Copy/Paste
Navigate to the Global Styles tab
Find the Global Classes tab
Select desired Global Class
Select respective Copy and Paste icons
Duplicate
Navigate to the Global Styles tab
Find the Global Classes tab
Find desired Global Class
Select the Duplicate icon (camera)
Global Stylesheet
Allows you to copy/paste individual Global Stylesheets.