Question

by default the presentation is saved with
extension.​

Answer 1

Explanation:

By default, PowerPoint saves your slide presentation as a PowerPoint presentation file with the . pptx file extension which, when double-clicked, launches PowerPoint. The presentation opens in whatever view was open when you saved it such as the Normal view or Slide Sorter view.

Answer 2

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By default, PowerPoint presentations are saved in the . pptx file type. However, there may be times when you need to use another file type, such as a PDF or PowerPoint 97-2003 presentation. It's easy to export your presentation from PowerPoint in a variety of file types.