The sorting interface is functionally complete now, and so is the lovely page-flipping system. Once you select a creature, you can flip back and forth between them. It remembers your position when you return to the index, and moves your cursor there automagically.
For keyboard and controller users, there's a shortcut that will sort things in all sortable interfaces in the game, toggling between the different modes. In this video it's by name and discovered (ascending and descending). Mouse users will simply be able to click on the buttons on the top right (or use the keyboard shortcut if they're very pro!)