Microsoft had released the web version of Office 2010 last year and user were able to access Word, PowerPoint or Excel online. Although the Office web apps are limited in features, it is still helpful because of its integration with SkyDrive. Office Web Apps has released a new update where in you can change the default theme for PowerPoint presentations created online. This new update brings most of the themes from the desktop version.
When you create a new PowerPoint presentation, you will be presented with the new themes to select from. Even if you are using old themes, you can change them using the new Change Theme button available.
You can choose from over 45 professionally designed themes (with new ones added regularly) to apply to your presentation.