Use the Blur medium to blur portions of the image.
         
         To
            blur the image:
         
         
            - Click
               Custom and select Blur from the Custom Media box.
               The Blur option boxes appear.
                
- Click
               Canvas.
            
- Set
               the brush size according to the size of the area you want to blur.
            
- Select
               either a Box or Gaussian filter from the Filter Type box.
            
- Set
               the density of the Blur brush from the Blur Strength box.
               You can choose Light, Medium, or Heavy.
                
- Drag
               the brush on the image.
                  
                     
                        
                        
                        
                           |  |  |  
                           | Original image | After using the Blur medium |