condense layout without redistributing islands

Hi Rizom lab!
Love the program you guys are making!
 a feature that would be great is the ability to reduce the space between uv shells without them being repacked.
sometimes say I like a certain orientation and layout of my uv shells but they just need to be a bit tighter. 
having a feature that automatically reduces the space between the UV shells without redistributing the uv entierly will be nice! 

here is what I am kind of thinking:
youtu.be/BFLioeIhGQE

- Thank-you!
- Andy An