The addresses are functions that strip blanks, concatenate City, State, and ZIP and print the addresses by inserting one data block.
You can edit the functions by going to the Toolbox, selecting Global Functions, and creating a sCompanyAddress2a and format the Address line 3. Use sCompanyAddress2 as a model and change the field to the address 3 field.
Note: The function sCompanyAddress3 is actually the city/state/zip information concatenated.