**Keyboard Shortcut for Creating Duplicate Slide in PowerPoint:**

The keyboard shortcut for creating a duplicate slide in PowerPoint is **Ctrl + Shift + D**.

**Explanation:**

To create a duplicate slide in PowerPoint, you can use the following steps:

1. Select the slide you want to duplicate in the slide thumbnail pane on the left side of the PowerPoint window.
2. Once the slide is selected, you can use the keyboard shortcut **Ctrl + Shift + D** to create a duplicate of the selected slide.

**Step-by-Step Explanation:**

1. Open PowerPoint and navigate to the slide thumbnail pane on the left side of the window.
2. Locate the slide you want to duplicate and click on it to select it.
3. Once the slide is selected, press and hold the **Ctrl** key on your keyboard.
4. While holding the **Ctrl** key, press and hold the **Shift** key.
5. While still holding the **Ctrl** and **Shift** keys, press the **D** key.

By using this keyboard shortcut combination, PowerPoint will create a duplicate of the selected slide. The duplicated slide will appear directly below the original slide in the slide thumbnail pane.

This keyboard shortcut can save you time and effort when you need to replicate a slide in your PowerPoint presentation. It eliminates the need to manually copy and paste the content from one slide to another.

Remember to keep the Ctrl and Shift keys pressed while pressing the D key to ensure the keyboard shortcut works properly. If you release any of the keys before pressing D, the shortcut may not work as intended.

Using keyboard shortcuts in PowerPoint can greatly enhance your productivity and efficiency when creating and editing presentations.