add more responsive steps / more grid options

hi there! is there a way to add more responsive steps than 'screen', 'tablet' and 'mobile'?
for better understanding: on an imac the grid has 5 columns ->ok! on an tablet 3 ->ok!
but in between there are no options and I would need less columns on a laptop compared to
a large imac screen.
... anyone?
Thanks!

Hi,

I had a similar problem and resolved it with a third part plugin  - take a look https://www.squarewebsites.org/products/lazy-summaries