Here we would like to draw your attention to /XFT/INV_C99 transaction code in SAP. As we know it is being used in the SAP BC (Basis) module. /XFT/INV_C99 is a transaction code used for Single field customizing in SAP.
It comes under the package /XFT/INV_CUSTOMIZING.
Transaction /XFT/INV_C99 technical data table
|Purpose||Single field customizing|