FI-TV Scheme and field control in Travel manager

Hello!

The question is - Is it possible to somehow customize field control for TRIP screen by means of SPRO IMG Schemeand field control or transaction FITVFELD (i.e. hide some fields or add new fields)? Or fields can be added or deleted only by ABAP modifications and User-exits?

Prerequisite: I need to add an additional CHAR or TEXT field "Document number" in TRIP transaction which will allow a manager to manually enter a document number of a trip. Further this field has to be added in reports as well, so that manager could get all the trip details due to this new field "Document number".

Best regards,

El