How to convert print spool output into a PDF format?

How to convert print spool output into  a PDF format?

Go to the Transaction SE38  ABAP Editor: Initial Screen   will open   here,  you have execute the  program RSTXPDFT4 (below)

Converting SAPScript (OTF) ABAP  List pool Job to PDF  screen will open(below) here  you have to enter the spool  request number  then execute (F8)