The
Blur tool softens hard edges or areas in an image by reducing detail.
Blurring a busy background can bring your target images more into
focus. You can also use Blur filters for this purpose.
Original photo (left), and photo after blurring the background (right)
Select the Blur tool .
Set options in the options bar:
Brushes pop‑up menu
Sets the brush tip. Click the arrow next to the brush
sample, choose a brush category from the Brushes pop‑up menu, and
then select a brush thumbnail.
Size
Sets the size of the brush, in pixels. Drag the Size
pop‑up slider or enter a size in the text box.
Mode
Specifies how the pixels you blur blend into other pixels
in the image.
Strength
Specifies the amount of blur that occurs with each stroke
All Layers
Blurs all visible layers. If this is deselected, the
tool blurs only the active layer.