How can you change the design of all slides in a presentation?

To change the design of all slides in a presentation, one effective approach is to select a new design in the "Design" tab. This feature in PowerPoint allows users to apply a cohesive visual style across all slides simultaneously, making it easy to create a unified look. When a new design is chosen, it updates the background, color scheme, fonts, and overall slide layout for the entire presentation, which enhances the visual appeal and professionalism of the slides.

Modifying the Slide Master is also a valid method to achieve a uniform design across multiple slides. However, the most straightforward and user-friendly option presented is to directly select a new design from the "Design" tab, which makes it accessible even for users who may not be familiar with the Slide Master functionality. This procedure ensures a quick implementation of a design change without the need for more complex adjustments.