Settings and Macros/Defaults Description

Node color was changed from default gray to green.
Filter was set to Multi-box to significantly increase its speed and avoid producing negative color values due to true Gaussian function oscillation.
Blur Size got three controls: Blur Size, X Blur Multiplier, Y Blur Multiplier, which lets you easily adjust the total amount of blurring after you set the blur aspect.
Size Mode button control was added. It gives you a choice to define the size either relatively to the image width just like in other Fusion tools such as Bitmap mask and DirectionalBlur or in pixels.
Discussion on PigsFly

Node color was changed from default gray to green.
Filter was set to Lens to simulate a lens defocus.
Defocus Size was increased to 5 to produce more noticeable effect.
Bloom Level was set to 0 because it has nothing to do with a physically correct defocus.
Lens Type was set to Circle as the most common case.

Node color was changed from default gray to green.
Type was set to Centered to avoid position shift like in Linear.
Lenth was set to 0.1 to produce an effect by default.

Node color was changed from default gray to orange.

Node color was changed from default gray to blue.

Node color was changed from default gray to red.

Node color was changed from default gray to red.

Node color was changed from default gray to red.
Filter Method was set to Catmull-Rom to produce a more accurate result.
Width Proxy Compensated and Height Proxy Compensated controls were added. They let you define the output resolution which won't be affected by the Proxy setting.

Node color was changed from default gray to red.
Filter Method was set to Catmull-Rom to produce a more accurate result.

Node color was changed from default gray to red.
Filter Method was set to Catmull-Rom to produce a more accurate result.

Node color was changed from default gray to red.

Node color was changed from default gray to violet.
Corner Positions were reset to the image corners.