Blurring the Image
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.
(a) Filter Type box (b) Blur Strength box
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.