Duplicated slides are inserted directly below the slides you have selected.

1. On the Outline tab or Slides tab in normal view, select the slides you want to duplicate. (If you want to select slides in order, press SHIFT as you click; for slides not in order, press CTRL as you click.)
2. On the Insert menu, click Duplicate Slide.

You can also duplicate slides by pressing CTRL+SHIFT+D.

1. In the pane that contains the Outline and Slides tabs, click the Slides tab.
2. Select one or more slides that you want to duplicate.
3. On the Home tab, in the Slides group, click Add Slide.
4. In the layout gallery, click Duplicate Selected Slides.

Note: The duplicated slides are inserted directly below the lowermost slide that you selected.