1. Caculating Area per Occupant - Setting Type : Number - Input(typing) : Area per Occupant - Using the Table of '2009 Internationnal Building CODE' - View Setting in Table - Make another Parameter named : Number of Occupants " Calculated Value " : Use fomula 2. Setting Building Numbers - When Clicking the Mass floor, The 'Mass Family' on Properties dialog box will tell you the Mass name that is allocated - Change the default value to 'Mass1, Mass2, Mass3' to see how it works - Add another Parameter 'Building Number' - Type : 'Text' - Placing the location where the 'Building Number' row will occupy - Setting the 'Sort/Grouping'