It is really painful to add each slide and reformat it to your preference. If in a notebook presentation you could create one slide and then duplicate it would cut down hours when creating notebook presentations.
Thank you for your idea. It is currently possible to copy and paste slides. To do this, select the slide and use CTRL+C to copy and CTRL+V to paste. You can copy/paste one slide at a time or multiple and can also copy/paste across notebooks.