The Field Blur filter lets you control blurring at specific areas of your image.
Against a uniformly blurred image, one or more selection handles can be added, positioned and edited to control the extent of blurring at that handle position, i.e.the focus origin. Multiple areas of focus can therefore be created.
Handles are independent of each other and can be repositioned and edited individually.
This filter can be applied as a non-destructive, live filter.
The following settings can be adjusted on the context toolbar: