PDMS ISODRAFT Reference Manual

http://www.cadfamily.com/a/CAD_CAID/Plant/PDMS-ISODRAFT-Reference-Manual_3650.html
You can display overall dimensions in addition to string or
composite dimensions. The default standout for overall
dimensions is 16mm. Overall dimensions are taken:
• From the start of a branch to the first change of direction
• From each change of direction to the next
• From the last change of direction to the end of a branch
• From the start of a falling section skew-box to the end of the
skew-box.