Blur Type boxSelect the type or shape of blur filter to apply to the clip. For example, a Box blur has rectangular edges. Depending on the blur type, some of the other blur setting vary.

Radial Mode boxAvailable when Radial is chosen as the blur type. Select whether a radial blur moves in one circular direction (Spin), or two rotating directions (Twist).

Bias field (not shown)Available when Directional or Radial Fast is chosen as the blur type. Displays the direction of the blur. Enter a positive value for a forward blur, a negative value for a backward blur, or 0 for a blur that moves in both directions.

Kernel Precision box (not shown)Available when Defocus is chosen as the blur type. Select the quality and speed of the defocus blur. For example, a 1x1 Kernel results in a fast, but coarse defocus blur.