Overrides are particularly useful for making minor changes to the
way a program functions or for selecting the data on which it operates without
having to recompile the program. Their principal value is in allowing you
to use general purpose programs in a wider variety of circumstances.
Examples of items where you can use overrides include the following cases:
- Changing the name of the file to process
- Selecting the database file member to process
- Indicating whether to spool output
- Directing output to a different tape unit
- Changing printer characteristics such as lines per inch and number of
copies
- Selecting the remote location to use with an ICF file
- Changing the characteristics of a communications session