I have a markdown document open but can't figure out how to use the Speed Read function. I had to look in the help to find it in the gear menu (why not in a main menu?) but it's greyed out and not selectable. Is there something I have to do to enable it? The help didn't suggest anything to me.
Marked 3.0.15 (1143) macOS 26.5.0, 2025 15" MacBook Air, M4, 32GB RAM, 1TB SSD