Deleting multiple slides simultaneously

To delete a single slide, simply select the slide and press the Delete key on the keyboard. To select slides in a presentation to delete, use your Ctrl key to select slides beneath each other using the mouse pointer, or slides that are non-contiguous. Right-click on one of the selected slides and choose Delete from the shortcut menu.

If you delete slides by mistake, you can bring them back by using the Undo Delete Slide (or Ctrl + Z) icon from the Quick Access Toolbar: