Cobol Copybook

Is there a way to create one cobol copybook that contains all group level records needed and then access just part of them where needed.  For example, let's say I have a trans-in file and trans-out file.  I want to put the record layout for both in a copybook and then in my FD section only access the necessary group levels needed for the in file and the out file descriptor.  I am relearning cobol from  1983 so i hope this makes sense the way I explained it.