-  Open the page that contains the element you want to copy in author mode - View menu > Work on this Page (All Changes).

-  Click on the elements action icon (gear, plus sign or arrow), choose more > Copy from the context menu. Note: The element action icon can be seen as a gear icon, yellow plus sign or yellow arrow depending on the status of the element – whether it’s published or work in progress status.

-  Close the window confirming the copy was successful.

-  Browse to the page you want to add the copied element to, make sure you are in author/edit mode.

-  Click on the Click to insert new element link.

-  From the Element Gallery window, click Paste Copied Element to insert the copied element on the page. 

Check out the How To video: