When viewing the "Player Board" display, you have the option to organize players by "Rank" or "Name" order.
You can change this by selecting the "Sort by..." drop-down menu.
If you are holding an in-person draft, and don't want owners in attendance to see players by rank, then you can sort them "By Name" (alphabetical).
Hide Rankings for Remote Owners
You can prevent remote owners from viewing the "Sort by rank" by turning on the "Hide Rankings" in the league SETTINGS area (at the bottom of the Settings area):