Changing Lpb In Existing Tune

Hi

Supposed I started (and almost finished) a tune with LPB=4 and finds out I need more resolution, is it possible in an easy way to change the LPB to something higher and having the tune playback sounding as before?

If I just change the LPB the tempo of music wil change, so I guess I need some way to insert blank lines between every line to keep the tempo the same…

Advanced Edit. Select Whole Song. Expand.

Ultra cool, thanks!