I looked up "Line Spacing" in Paint.net on Google Search and found a 2010 posting that said "not controllable at this time."
https://forums.getpaint.net/topic/18984-how-do-i-adjust-line-spacing-in-my-text/
Has that changed in Eleven Years ?
I just had 4.3.4 load up.
Thank you !
DoctorBill