Is there a way to clean all the notebook without closing it and opening another one?
Thanks!
Ctrl+A and DEL (or Backspace) works for me (in Windows). I am using the Wolfram Cloud. I also do Evaluation->ResetSession to reset the cell output numbers.
Programmatic solutions can be found in this thread: "How can I clear the content of my notebook in Mathematica?"
Do you want to remove all the cells in the notebook?
Edit > Select All Then Delete
Yeah buddy, thanks