Style Properties
The style properties panel of an element opens when selecting the icon 
of its context menu.
Shadow
Allows to define a shadow effect around the element.
Type
Possible Values
•Outset
•Inset
Horizontal
Horizontal size of the shadow to the right of the element. It can be expressed in pixels (px), percentage (%), viewport width (vw), and viewport height (vh).
Vertical
Vertical size of the shadow below the element. It can be expressed in pixels (px), percentage (%), viewport width (vw), and viewport height (vh).
Blur
The greater this value is, the greater and lighter the shadow becomes. If not specified, its value is 0 and the shadow border is darker. It can be expressed in pixels (px), percentage (%), viewport width (vw), and viewport height (vh).
Spread
Positive values will cause the shadow to expand and grow bigger, while negative values will cause the shadow to shrink. If not specified, its value is 0 and the shadow will have the same size as the element.
Color
Defines the color of the shadow.
Transparency
Defines the transparency of the shadow.
