Which option should Layla use to automatically add elements like the company logo and contact information to all slides?

Using the Slide Master is the most efficient way for Layla to ensure that elements like the company logo and contact information are consistently applied across all slides in a presentation. The Slide Master serves as a template for the entire presentation, allowing the user to set universal design elements such as fonts, colors, backgrounds, and logos.

By adding these elements on the Slide Master, they automatically populate in every slide that is based on that master layout. This not only saves time but also maintains a cohesive and professional look throughout the presentation. If she needs to make changes, such as updating the logo or adjusting contact information, she can do so in one place, and the changes will reflect across all slides, ensuring uniformity.

Other options like Slide Layout apply to specific slide designs rather than globally affecting every slide, Template Design typically involves broader style choices without the specific benefit of customizing elements across all slides, and Presentation Settings usually focus on configurations related to how the presentation is delivered, like slide timings or transitions. These do not offer the targeted approach for consistent element application that the Slide Master does.