120 Powerpoint | How to duplicate slides inside a show?

First select the slide or slides from the Slides menu on the left.
Multiple slides can be selected whilst holding down CTRL on your
keyboard and pressing once on appropriate slides. Next go under
Home tab into Slides section. Click on “New Slide” and choose
Duplicate Selected Slides from the down appearing menu. Your slides
are now appearing twice in the show. - Office ToDo