Why can't I see all the parameters in a predefined job definition?

When you view, edit, or duplicate a predefined job definition, it's possible that you won't see all the parameters that users see when they submit the scheduled process.

There are two types of parameters, based on task flows and view objects. Only the parameters based on view objects are available on the Manage Job Definitions tab. The ones based on task flows are not visible. Any parameters you create would also be based on view objects.