Chat with everyone at the screening: on the Showtime page, on your phone, and over the film on the TV.
In Broadcast: the lobby: quick replies, or Finish on your phone to type there.
In Classic or Neu: the Showtime page, beside the countdown.
A shared screening has its chat here, beside the countdown.
At a screening with linked Usherrs, the chat reaches every house, no Discord needed: type below, tick Spoiler to blur a message until someone taps it, and press Send. Messages are plain text, up to 500 characters. A watch party shared in Discord shows its thread here instead: what you send goes into the thread under your Discord name (link your Discord account first, in Linked services).
Open Usherr on your phone, then Showtime, and press On your phone next to the chat. Leave it open while the film plays on the TV: it has the five reactions too. For a Discord party, the Discord app works just as well.
When the film plays on the Showtime screen, press Chat on the player: new messages fade in at a corner of the picture for a few seconds, never spoilers. It’s off until you switch it on. For full screen, use the player’s own full screen button, so the chat shows there too.
After the film, the chat stays on the Showtime page with the party. Between parties, a crew has a chat of its own.