How do I apply the same design idea to all slides in PowerPoint?

To apply the same design idea to all slides in a PowerPoint presentation, follow these steps:

1. Open the PowerPoint presentation and go to the slide where you want to apply the design idea.
2. Click the “Design” tab in the ribbon.
3. Click the “Slide Layout” button in the “Customize” group.
4. In the “Slide Layout” window, choose the layout that you want to apply to the slide.
5. Click the “Slides” tab in the ribbon.
6. In the “Slides” pane on the left side of the window, select all of the slides that you want to apply the layout to. You can do this by clicking on the first slide, holding down the “Shift” key, and clicking on the last slide.
7. Right-click on one of the selected slides and choose “Apply Layout” from the menu.
8. In the “Apply Layout” window, choose the layout that you want to apply and click “Apply”.

The chosen layout will be applied to all of the selected slides. Any content that does not fit in the new layout will be hidden, so you may need to adjust the content on the slides after applying the layout.