To access this dialog, from the File menu, choose Export>Constraint Files, select PDC Files (*.pdc) as the type, and then click Save.
Use this dialog box to specify the type of information to include in your PDC file. Options include:
Pin locations and attributes: Select to export information about the pin locations and attributes only.
Placement constraints: Select to export information about the I/O placement and routing constraints only.
Complete placement information: Select to export information about all of the physical design constraints (I/O constraints, I/O banks, routing constraints, region constraints, and global management constraints (global and local clocks).
Type a name for your file, and then click OK. A message appears in the Log window telling you if the Export command succeeded.