0 used to introduce a new subject to be considered or to give further information: --
Oh, by the way, my name's Julie.
I think we've discussed everything we need to - by the way, what time is it?
1 used for introducing a statement or subject that may not be directly related to the subject being discussed: --
By the way, I heard that Phyllis may be moving to Dallas.
NYA ORD
European
May 10, 2021
DAGENS ORD
Shimmer
by the way