The PowerPoint Web App provides you with a solid collection of commands for creating a new presentation or editing an existing presentation that you have saved to your SkyDrive or SharePoint site library. It is probably the most full-featured of the Office Web Apps. When you create a new presentation, you must provide a filename (as with the other Office Web Apps) and then the PowerPoint Web App opens in your browser window. The first thing that the Web App requires when you create a new presentation is that you select a theme for the presentation. The Select Theme dialog box opens, as shown in Figure 5.16.