Add a button to label the pressure drop for a run of duct (the "Pressure Drop in this Section" value from the the "Query Duct" window). We use DM HVAC to do a lot of existing ductwork analysis for energy audits, etc., and we could really use a function that shows us how much pressure drop each section of the ductwork has, and the pressure drop for each fitting, in much the same format as the ductwork size labels currently appear.