By default each stack has a chat channel that allows viewers (and the author) to post questions, comments and answers that attach to the stack. The chat channel is a single discussion thread.
Viewers of your stack can view and contribute to the chat by tapping on the chat icon when they are viewing your stack. They will be asked to sign-in if they are not already signed in. If they do not have an account then they can sign-in using one of the social media routes or by creating a new Learning Toolbox account. If the viewer is signed in, then the counter on the chat icon shows the number of unread chat messages.
In the chat area, viewers (and the author) of the stack can send chat messages and can also turn on email notifications if they want to receive email notifications of any new chat activity on this stack.
For more information on how delegates and authors can engage with the published showcase ePosters, you can view the Showcase Help Page.
This chat discussion is public – viewable by anyone who looks at the stack. The author can choose to turn off the chat channel if they do not wish to allow discussion around the stack. This is done in the stack editor.