This function allows you to add circular gradation. Change the number and contrast to change the shape.

Prepare an illustration you would like to add gradation to.

Open ① the Layer window, and add ② a new layer to the top.

Tap ②Multiply from ①Blend Mode. Drag the slider of ③Opacity to adjust as you like.

Tap ②Filter from ①Tool Selection window .

Tap ①Concentric Gradation .

Drag the ①Slider to adjust. You can move the gradient start position by dragging ② .

Tap the ① Knob twice to open the Color Picker. Drag the ②Slider to adjust the color.

When finished, return to the canvas with ①✓ button .

And you're finished.