Keep in mind that the Blur amount value is global, so it’s applied to all the pins you add to the image. In other words, unlike the Field Blur, you can’t assign a different Blur value to each pin. You can, however, change the Focus value in the Options Bar at the top. This blurs the default 100% sharp area between the center pin and the inner dots. If you want the focus to be a 100% for only one pin, then you can reduce the Focus value for the rest of the pins as needed.