Where are the reader settings?

The settings icon is on the right of the reader header:

• Mode — page by page or as a strip (handy for webtoons).
• Width of the page — on a phone, as a percentage of the screen.
• Brightness.
• Tap zones — where to tap to turn pages: right-handed, left-handed, forward only and other layouts; “Invert” swaps them.

Width and zones are remembered in the browser.