Delete all costumes in the TIERLIST ITEMS Sprite, add any of your own that you want. Drag each one to a tier as it appears and the next one will appear automatically. Click the stage to show and hide the size adjuster if you need more space for more Items. Dynamically adds a single item for every single costume in the sprite, and changes them to be almost universal size no matter what size image you put in. For convenience. Have fun tiering things, I spose. lol