Rotating
You can click the Rotate tool 
to quickly rotate a picture to the right. (If you rotate an image displayed in an album, you can’t undo it.)
For more options, select Rotate from the Image menu. You can choose one of the following:
◗Left (90 degrees counterclockwise)
◗Right (90 degrees clockwise)
◗Exact (specify the degree of rotation)
◗Free (interactive rotation, as described below)
If you want to experiment with rotation, choose Free and follow these steps:
1Click on your image and hold down the mouse. Your pointer turns into the rotation tool.
A rectangular outline of your image and an arrow appear, as shown:
2Move the pointer to rotate your image.
3Release the mouse when your picture is at the angle you want.