vert-margin in subarea<%>
Gets or sets the area's vertical margin, which is added both to the right and left, for geometry management. See Geometry Management for more information.
( -> exact integer in [0, 1000]send a-subarea vert-margin)
Returns the current vertical margin.
( -> void
send a-subarea vert-margin margin)
margin : exact integer in [0, 1000]
Sets the vertical margin.