Individual Track Height of 1,5

Hey folks!

I saw this guy on YouTube who had set up his track height to what looks like 1,5 rows. How is that possible? That would be amazing, as I often find myself struggling with 1 row as well as finding that 2 rows take too much place. Something in between like on the picture (and for example in studio one) would be amazing.
I tried the “N-Track height” but it only allows whole numbers.