.SPF file(LineNumberedFile)
Specify option=(m72,n) on CID header line.
ex) //CID://+DATE~R:#63 option=(m72,n)
This mean CID format is //~yymdd~ and set to column 63.
Margin is 1-72(Input avail) and n means LineNumbered file.
By this line,the file is treated as SPF file.
(All lines are 80 byte fixed length line,73-78 is lineno column,
79-80 is file update level).SPF file is kept as fixed length,
with line number/version number maintenance automaticaly.
Chapter-(3)
If no CID position requrement,Edit/Browse/Select cmd with /Mn
treate files as SPF file(No CID header required).
EN/BN/SN cmd is alias of Edit/Browse/Select cmd each with /Mn.