The horizontal and vertical margins in the generated HMX drawing can be customized using the Horizontal and Vertical textboxes, respectively.

The Horizontal margins define the width of the left and the right drawing margins from the edge of the drawing template.

The Vertical margin defines the height of the top and bottom drawing margins from the edge of the drawing template.

By default, a value of 15 millimeters or 0.50 inches is used for the margins.