How to reduce the interline in preview mode in Minimal Theme?

I look for this for a while and am still stuck… Thank you for your courtesy and answer!

Please give some more information what you want to achieve!

  1. By “interline” do you mean the horizontal rules (that will appear if you type *** or ---)?
  2. If so, what do you want to reduce? Their thickness? Their length?
  3. Or do you mean the space between paragraphs?

So sorry… used calque… I mean line spacing…