create a formula and have that use hard crlf (chrw(13)+chrw(10)) at the end of each viable address line, then display the formula with 'Can Grow' checked.
for example
local stringvar adress:="";
if not isnull({table.address1}) then adress:=adress + chrw(13) + chrw(10) +{table.address1};
//repeat for other address lines changing the field name
//display result
mid(adress, 3) //strip off the initial crlf
HTH