Hello and welcome to the forum,
As you have seen, there are acceptable "things to do" here and others that are not. . .
You need to use a meaningful title that tells what you are asking about. Nothing in your post has anything to do with JCL. . .
You also need to take time to make sure you post your question in the proper part of the forum. COBOL is only for COBOL topics.
As you have not mentioned which environment is being used, i'll guess it is TSO/ISPF. To do what i believe you want, Edit/View a member or file and enter HEX ON in the "Command ===> " area.
Hope this helps,