You can quickly create the basic framework for a professional-looking presentation by applying a theme for a unified look, adding new slides with various slide layouts, and then adding visual interest by applying a slide transition to all slides.
On the Design tab, click the theme you want.
To see more themes, point to a theme, and then click .
On the Home tab, click New Slide.
To choose a different slide layout, click the arrow next to New Slide and then click the slide layout you want.
On the Transitions tab, click the transition you want.
To see more transitions, point to a transition, and then click .
On the Transitions tab, click Apply To All.
Now that you have this basic framework in place, you can type the text for your slides, and add any other objects or media to the slides to complete the presentation.