How do I post a GIF or Sticker?
To post a GIF or a Sticker in a chat message, long press any message or GIF or sticker. Reaction choices will appear.
Select a reaction (you may only select one at a time).
To change your reaction, repeat these steps. If you would like to see who has reacted, pull the reaction menu up to reveal a list of users and the reactions they chose.
Can I send GIFs or Stickers?
Tapping the smiley face to the left of the text input field will reveal the GIFs and Stickers menu. Choose a GIF or Sticker and hit send.
Examples of the Reaction Menus (GIFs & Stickers)