I ask because it’s considered common knowledge that you can’t but I regularly have dreams where I continue books I’m reading irl (they usually devolve into naritive nonsense over time and then sometimes to blank pages, but the actual text is definitely deciferable), text messages, computer screens, and road signs, in both lucid and regular dreams. Am I the odd man out or is it actually just something people say?
I've seen billboards, street signs, addresses written on curbs, numbers on apartment doors. Once was in a city reading a chalkboard menu for Mexican food, amazed at prices, wondering if I could speak Spanish well enough to ask questions.
Reading is never main focus though. More vaguely in background.