Thanks Silimtao.
Anytime you come across a maj7 chord; you can treat it as a simple major triad, and you won’t have any problems at all.
Once your ear is trained you will hear the seventh note, (same thing with notes in the extended chords) and you will be able to play cool licks over those chords, targeting their chord tones.

You are correct about A being the 5th in the Dm7 chord, so if you keep resolving back to it, that’s just fine; but, you are not in a different mode. If the backing chord was an Am7 instead of Dm7; then you would be in the A Phrygian Mode.

I like to program weird and out of the box chords in FL Studio and experiment playing different modes and scales over them. I guess you can say that’s my practicing and training.
But when it comes to recording I just play what sounds good to me.

Anyway, good luck and happy jamming, dude. :cool: