ViolentV is correct, there's no way to scroll through location description. I think it's a glitch from PC to PS4 transfer, using the mouse on PC scrolls through it I believe. The tips that pop up during loading screen on PS4 show not much was corrected/updated for PS4, still says to skip time forward "Press [T]". If you'd like to read full description of any waterway, one of the mods created waterway threads in the Tips/Techniques section (I think) of this forum.