A data-processor can provide a special dialog window so that data can be manipulated manually live.
E.g. assumed the application has to send data to another application via data play-back and uses a data-processor to manipulate these data before sending. Assumed the user want toggle a specific flag manually during the play-back. The developer of the data-processor can provide a dialog with a check-box where this flag can set/reset manually.
The following three functions are related to data-processor dialogs.