B.D. Thomas,
First of all +1

I get exactly what you are requested. While in short term you want to prolong hold or even overlap to next bar, I am guessing it's a bit more than that. To "humanize" space. Not sure what exact musical term it falls under... A very slight pause between one bar and another, but less than a beat, which in your case would prolong the hold. I think it's called "breath mark" (luftpause or comma) in notation.
B.D., Am I on the right path? If not, please let me know, I will do a new request.