Drop Shadow lets you add shadow below your illustration, to make your drawing stand out.
Open ① the Layer window, and add ② new layer and move it underneath the layer you would like to apply the filter to.
Tap ②Filter from ①Tool Selection window .
Select ① Drop Shadow.
Drag ① the sliders left and right to make adjustments.
Open ①Color Picker . Drag the ②Slider to adjust the color.
When finished, return to the canvas with ①✓ button .
Finished.