1. Select the Crop tool in the toolbox.
2. In the options bar at the top of the work area, make sure Width, Height, and Resolution contain no values. These settings constrain the dimensions of the crop rectangle. If necessary, click the Clear button to clear them.
3. Drag over the part of the photo that you want to keep. To straighten or rotate the photo, drag the cropping rectangle over the entire photo.
4. When you are satisfied with the size and location of the cropping rectangle, press Enter (Windows)