BAdi

Hi

for e.g for ME23n tranction i want to add a subscreen. but for that tranction i have two badi definations let it be 1) badisubscreen1

2) badisubscreen 2.

so my question is which badi defination i shd use for implementation. how to find out that badi defination. whether by debugging or any other method is there to find out a badi defination