You can use the options in the Rotate section to rotate the image at a pre-set angle or at a custom angle.
To Use the Rotate Options:
In the Batch Edit wizard, select the Rotate checkbox.
Rotate Options
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                     No rotation  | 
                
                     This option is selected by default so you see the un-rotated image until you are ready to select a rotation option.  | 
            
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                     180°  | 
                
                     Rotates the image 180 degrees.  | 
            
| 
                     Left 90°  | 
                
                     Rotates the image to the left by 90 degrees.  | 
            
| 
                     Right 90°  | 
                
                     Rotates the image to the right by 90 degrees.  | 
            
| 
                     Custom angle  | 
                
                     Select this option and then either type a custom angle number into the spin box or click the arrow and drag it around the circle until the image is rotated to the desired angle.  | 
            
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                     Background color  | 
                
                     The color that you select displays behind the rotated image.  | 
            
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                     Draw a line on the image that you want to become vertical or horizontal  | 
                
                     Click the Horizontal or Vertical button, and then use the cursor to draw a line on the image that you want set as horizontal or vertical.  | 
            
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                     Automatic cropping  | 
                
                     When you rotate an image at a custom angle, select Automatic cropping if you want to crop the image to the largest possible rectangular size within the rotated image.  | 
            
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                     Reset  | 
                
                     Click to reset all options to the default.  |