Add your favorite characters to your conversations! Heart and Brain is here! Over 30 super stylish stickers to choose from! These stickers will make you the star of your group chat. How do I browse all installed iMessage stickers? 1. Launch Messages from your Home screen. 2. Tap on the Apps button. (Looks like the App Store icon.) If you've already begun typing, it'll be hidden and you'll need to tap on the Show More button to the left to reveal it. 3. Tap on the App Shelf button (looks like four ellipses in a grid). 4. Tap on any sticker pack or app to access it. 5. Send the best Heart and Brain! Stickers to your friends!