To perform a takeoff, go to
Ribbon: DM HVAC->Takeoffs-> 
Print Takeoff Area
Pulldown Menu: DM HVAC->Takeoffs->Print Takeoff Area
You will be prompted to identify which takeoff area is to be used for the takeoff calculations.
Specify point inside takeoff area:
If you specify a point inside multiple takeoff areas, the Select Takeoff Area dialog box will appear.
Select the takeoff area you want to use and press the OK button. The takeoff will be generated as an HTML file and displayed in your web browser. An example takeoff is shown below.
