The function allows you to change the hue, saturation, and lightness. Hue adjusts the hue of the illustration, saturation changes the vividness, and lightness adjusts the brightness.
From ① the Tool Selection window, select ② Filter.
Select ① "Hue Saturation Lightness".
Drag the ①Slider to adjust. When finished, return to the canvas with ②✓ button .
Finished.