This is from General settings. Font is TNR size 12:
This is from Document settings, different default formatting selected. Font is still TNR size 12.
As far as I can see, every setting is the same, but the paragraph spacing is different.
I hadn’t noticed the document settings before, and all I did was click “Use different default formatting” and it changed to this. Now I’m wondering how do I change the paragraph spacing if it’s something I want to do on purpose?