Elements such as boxes and images can have shadows to give them a more real-world, dimensional feel. Add shadows by clicking the “+” in the “Shadows” panel located in the sidebar.
The options for a shadow are the following:
Regular or inset shadow
Direction and color
Move: how far the shadow is from its element
Blur: the softness of the shadow
Size: when blur is set to “0”, a larger size will act like a solid border
An element can have multiple shadows that can be layered and sorted.