Q: I have difficulty in copy and paste function while creating article.
A: The simple solution is use shortcuts for copy and paste.
Universal shortcut in PC is for copy is Ctrl+C (Press 'Ctrl' button and 'C' button in your key board at the same time)
and for paste it is Ctrl+V (Press 'Ctrl' button and 'V' button in your key board at the same time)
In a mac computer use Command-C for copy and Command-V for paste