Content Cloning
Content cloning is the process of creating a new content using an existing content as template.
The content cloning feature is available in the content editor information pane for all content types configured to be cloneable in the Content Developer. See configuration.

Pressing the Clone content button will clone the current content and open the resulting content as an unsaved content in the content editor.
The resulting content clone will have retained all data from the template content with the exception of some system data (such as slug information) that is automatically cleared.
onContentClone callback
The content cloning process is customizable by registering a onContentClone
callback in ACE.
The callback will be executed (by the Content Developer) prior to the new content being opened in
the Content Developer content editor and is an opportunity to perform automated manipulation
and / or enrichment of the copied data.