Changing field in QA11 screen

Hello All,

I have a requirement where in I need to set the field SLED/BBD in the first screen of QA11 in Display mode i.e. it should be grayed out so that user should not enter any value there. Field for the same is RQEVA-MHD_01.

I tried to use many exits which look familiar but was unable to get the field passed there.

Request you to please suggest an Exit or Badi where I can change the the field in display mode directly through change in screen or by coding as Screen-Input = 0.

Please suggest how to achieve this result.

Thanks,

Harjeet