You can change the background of your PowerPoint slides using the "Format Background" feature located in the "Design" tab.
PowerPoint has a great set of special effects, graphics, animations, and template themes. There’s just one problem: Everybody else has the same effects, animations, and template themes that you have.
How-To Geek on MSN
How to Crop Pictures in Microsoft Word, Excel, and PowerPoint
To manually crop a picture in Microsoft Word, Excel, or PowerPoint, select it, and in the Picture Format tab on the ribbon, click the top half of the split "Crop" button.
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