Where is the knock button for knocking? Paulo P. March 06, 2019 11:57 Updated Follow The Knock button appears on their avatar, when the player is able to knock. click for customer support Related articles What does knock mean? When is a player able to knock? What does Gin mean? When can a player go Gin? Where is the Gin button to go Gin? Is there any extra bonus for Gin? Personal Data Requests Comments 0 comments Article is closed for comments.