The EDIT PICTURE feature allows you to do some basic editing such as Red Eye, Crop, Enhance, and rotation of your photos.

Here is where you can use Picasa's organization abilities. Name an album/folder where you want some temporary photos to go which have been cropped, and then select those photos in the album/folder for your desired export option, such as printing. In this way, you can print several of your cropped photos at one time.