In their default mode, Print components remain active throughout the life cycle of the Procedure in which they are located, and all active Print components will respond to all events that may occur in the course of creating the report, such as "end of page," or "beginning of the new page." When this happens, all active Print components will attempt to print their Header or Footer segments, if they are appropriately defined by the corresponding Print templates.
The Terminator component overrides this default behavior by explicitly terminating the "life" of the specified Print component when it has run its course, to prevent it from interfering with other Print components that should continue running. However, you must select the applicable Print Template, forming part of the Procedure, from the listing made available to you in the Print Terminator Inspector:
See also The Life cycle of Print Templates.