Rotate Left / Right / Custom/Fine
Click on the Image Menu, then Rotate Left. The image will turn 90 degrees; the top of the image will move towards the left.
Click on the Image Menu, then Rotate Right. The image will turn 90 degrees; the top of the image will move towards the right.
A dialog allows you to enter a special degree (range: -360 – +360) for the image rotation.
Enter a value to control how far the image is rotated; positive numbers (e.g. 30) rotate the image to the right, negative (e.g. -30) rotate the image to the left; higher numbers rotate the image farther; default is 45. You can also set the color of the background area, produced by the rotation.