I found How to restore Okular default (toolbar) settings, and the short answer is press Ctrl+M.
This via HN today: What time-weighted averages are and why you should care. Looks really interesting! Wish I had time to read it closely…
This old chestnut via Lobsters today: You can’t tell people anything.
Today via r/programming: CSS Position: Locate Your HTML Elements Like a Guru.
This via r/programming today: What I Wish I Knew About CSS When Starting Out As A Frontender.