Table 2.

Tools for interaction

Pre-recorded content	Chat/open discussion forum	Tool to get users to engage with one another and feel the community presence during the event. During the broadcasting of the session, chairs and presenters were asked to connect in order to participate to the discussion form, animate the discussion, and respond to questions. Experts were appointed to act as discussion forum animators to encourage scientific exchange on each of the 10 Channels by Topic.
	Interaction options with e-poster presenters	Viewers had following options   to follow the presenter on Twitter To ‘like’ the presentation To download the poster To leave a comment on the presentation Presenters were encouraged to access their presentations regularly to address comments and questions of the viewers.
	Surveys	Many sessions were followed by a quick survey to collect timely feedback on how users were enjoying their experience and the content they were accessing.
	Q&A sessions	Typically industry-sponsored sessions consisting of a pre-recorded portion and a Q&A segment in which presenter were connected via a video-conference tool and exchanged with the viewers.
Real-time produced content	Q&A mode	Questions coming in via chat were triaged by a dedicated question moderator and then formulated by the chairs to Hot Line trial presenters connecting via a video-conference tool during afternoon live sessions in the 3D studios in Amsterdam.