2.7Add the IV chord

Then E♭maj7.

From B♭maj7:

RH D-A

move to E♭maj7:

perhaps:

D-G

with LH E♭.

Now D stays common.

Very smooth.

So:

Cm7 → F7 → B♭maj7 → E♭maj7

can be voiced with almost no RH jumping.