Myotai wrote:Aware of my breath yes, but only when I move my attention to it. Otherwise...
Well, certainly, one is only aware of what is in awareness.
But the text says "breathing in, he trains... breathing out, he trains..." and this for each tetrad. So, when the breath isn't in awareness, I'm not sure that's anapanasati any longer; it sounds like it might have become some sort of seated cittanupassana at that point, where you're aware "this is an expansive mind, easy to direct" or "this is a vacuous mind, sluggish and muted" and so forth.
That's part of experiencing citta, so it's third-tetrad stuff either way, but you'd need to have it alongside the breath for it to be anapanasati, and you'd need to be experiencing and then gladdening it, not experiencing it and then falling off the cliff into breathless limbo.