Suppose you only know the label of extension field is CCTV:

How to find its technical name in backend?
SE16, use search function:
Technical name found: ZZBFLD0000NX
Then tcode AXTSHOW, type technical name:
Whole technical detail displayed:
Suppose you only know the label of extension field is CCTV:
How to find its technical name in backend?
SE16, use search function:
Technical name found: ZZBFLD0000NX
Then tcode AXTSHOW, type technical name:
Whole technical detail displayed: