Does anyone know how to create a page group?

I can see on right-click there’s a “save page to group” - and I have a replo created “Support Copies” group - but how would I create another so we can better org stuff?

Here’s a quick loom on how to organise your pages into collections
https://www.loom.com/share/2474569c7dd0411db653534c7725a27e

We’ve also got a documentation page on this btw!

should have some more info there