I just started using the unit vh in #CSS. We always struggle with the height of a page. Now I can set the height to 100vh and it will fill the entire viewport. I combined it with #CSSGridLayout. So, 1st row with the height of 2em and the 2nd row with the height of calc(100vh - 2em). Nice 📝 You should read up on https://developer.mozilla.org/en-US/docs/Web/CSS/length