How can you apply the transition to all slides in the presentation?

To apply the transition to all slides in a PowerPoint presentation, the correct method is to use the "apply to all" button. This function is specifically designed to enable users to apply the selected transition effect consistently across every slide in the presentation. By selecting a transition and then clicking the "apply to all" button, you ensure that the same visual effect will be experienced when moving from one slide to another, creating a cohesive and professional look throughout the entire presentation.

Other options, while they may seem plausible, do not achieve the desired outcome of uniformly applying transitions. For instance, clicking on the transition effects button would allow you to choose or modify the transition but wouldn’t apply it to all slides without the specific action of using the “apply to all” feature. Similarly, clicking the design tab does not manage transitions; it pertains to overall slide design and layouts. Lastly, clicking the save changes button is unrelated to transitioning slides; it simply saves any adjustments made within the presentation, but it does not influence the sequencing or effects applied to the slides themselves.