CAT2 Data Entry Screen

In CAT2 sheet 3 columns are in Display mode. Column names are namely 1. Project 2. Project Description 3. Project Subobject

I tried field selection through CAC2 (1 of the SPRO setting) through Data Entry Section and kept the filed as "Input", eventhough i cannot see it editable.

Anybody having idea ?

Regards

Ashish