Did you find you chose the wrong design for your PowerPoint presentation? No need to close it and open a new one.
Quickly change to a new design from the Themes group in the Design tab.
Themes are live galleries, allowing you to see what it looks like before you make a choice. Simply hover over the theme you like best, to see how your presentation will look.
Click the theme you want to use, and PowerPoint will alter the presentation for you.
For more office techniques see our MS Office Tips.