The HEADER option lets you control what appears in the middle of each header line in the compiler listing.
.-SOURCE-. >>-HEADER--(--+-FILE---+--)------------------------------------><
Specifying HEADER(SOURCE) causes the compiler to use the text in the first source line after any *PROCESS statements as the middle of each header line in the compiler listing.
Specifying HEADER(FILE) causes the compiler to use the name of the source file as the middle of each header line in the compiler listing.
The default is HEADER(SOURCE).