Mandatory field GOHEAD-BKTXT in MIGO (OMXJ)

Hi,

I want to set field GOHEAD-BKTXT mandatory in Transaction MIGO but not for all users. In TRX OMJX I found an option "Influencing" but I do not know how to use it.

When I use the matchcode in field "Contents" I receive a message that no input help is available.

How can I set up this field mandatory for specific users/areas?

Regards.

Carlos Durazo