Max Width

The max-width property sets the maximum width of an element. Note: The max-width property does not include padding, borders, or margins.

Value	Description
(numeric)	e.g. '400' would set the maximun width to 400 pixels (Microthemer automatically adds the 'px' unit if a unit isn't specified). Other commonly used units include 'em' and '%'. So you could enter '50%' in the Max Width field.