On a screen with a table, how to identify a field code when I cannot click on the field?

SOLVED

Hi,

Rookie developer question here.

This is on GESBIS, Screen code is: BIS3.

Other than identify through Description and make best effort guess on the field's code, is there a way for me to identify the field name's code which I cannot edit on?

I tried clicking on it and it lead me to the nearest editable section. When I use ESC-F6 or ask for field properties, it will show me the nearest editable section's code (in this case, the Purchase Type's field code), which is not the one I want.