In order to copy a paragraph it mut be opened first. Each opened paragraph has asection with buttons for different actions.
By clicking the third button
the paragraph is copied to the clipboard. Hereafter the button 'from clipboard' is activated in the lower menu.
By clicking the button the copied paragraph will be inserted into the final (lowest) position.
The action is only persistently saved by clicking 'save'.
By clickin 'cancel' the action can be reversed.