Margin Bottom

The margin-bottom property sets the bottom margin (space) of an element. The space is created outside the element's border.

Value	Description
(numeric)	e.g. '15' would set the bottom margin for an element to 15 pixels (Microthemer automatically adds the 'px' unit if a unit isn't specified). Other commonly used units include 'em' and '%'. So you could enter '5%' in the Bottom Margin field.