It’s extremely important to be able to communicate the DL’s alignment. We speak of their alignment in terms of what technique they’re playing. If I was the RG and the Coach said, What was the DT playing on you - and I said, He was playing a 3 tech - Now the coach understands what I was seeing in front of me.
This alignment system is consistent across football - the one nuance you’ll see are the alignments on an in-line TE.
Above, I have listed from inside out on the TE ~ 6i, 6, 9.
Also common to see, from inside out on the TE ~ 7, 6, 9.