In OBS: + → Browser → paste the link into the URL box (do not tick "Local file") → about 700 × 440, or 1920 × 1080 when it flies in.
Chat commands
viewers — !1!2!3 … or !vote 2 · one vote each, voting again moves it · !tally shows the page
you & mods — !poll Question? | A | B | C (up to 6) · !close circles the winner · !reopen · !clearpoll · !prevpoll / !nextpoll (last 20 kept)