How to Add, Duplicate, Move, Delete or Hide Slides in PowerPoint

First, let’s see how to create a new slide. There are several ways to do this:

• Select any slide and press Ctrl + M in Windows, or Cmd + M in Mac. A new slide will be created with the same design as the selected slide. 
• Right-click on any slide and choose New Slide. A new slide will be created below the selected slide.
• Go to the Slides section of the Home tab and click on New Slide (if you click on the little arrow, you’ll also be able to choose the design for this new slide).

Creating a new slide might not be always the best option for you. You might want to keep a certain clipped image or part of a text from a previous slide in a new one. In this case, it’s best if you duplicate a slide.

To duplicate a slide, select it, right-click on it and choose Duplicate Slide.

You might also need to delete a slide from your presentation because you do no longer want it. To delete a slide, select it, right-click on it and choose Delete Slide. You can also select it and just press the Delete or Backspace key. Remember that you can select multiple slides by holding the Ctrl key (Cmd in Mac) while clicking on them. This might be useful if you want to remove several slides at the same time.

You can also rearrange the slides, that is, moving them from one position to another. To do that, select the ones you want to move and drag them to the desired position. As I mentioned before, to select multiple slides, hold the Ctrl key (Cmd in Mac) while clicking on them.

To do this, select the slide or slides that you want to hide, right-click on them and choose Hide Slide. They will no longer be visible in your presentation. Any hidden slide will have its number crossed out, so you can identify them easily.