Collaborate Ultra: How to Avoid the Tunnel Effect

How to avoid the tunnel view, or infinite-window effect, when sharing your desktop in Collaborate Ultra.

Blackboard’s contract to provide web conference services to the University of Wisconsin will expire on 6/30/2021. Access to Blackboard Collaborate Ultra web conference sessions, recordings, usage data, and all other services will end on that date. The UW System plans on negotiating a conferencing contract with Zoom before the start of the Fall 2021 semester. Alternative conferencing tools such as Microsoft Teams and WebEx will continue to be available during this transition. More information can be found here.


When sharing an application or screen in Collaborate Ultra, a user may experience a tunnel view, or infinite-window effect. This will occur when the screen or browser that is selected for sharing is displaying the active Ultra session.

Image of Blackboard Collaborate Ultra Session Tunnel Effect

How to avoid the tunnel effect:

  • When two or more monitors are being used, make sure that the window hosting the Ultra session is moved off of the screen that will be shared prior to initiating a screen share.
  • Share an individual application rather than the entire screen.
  • Prior to sharing the browser that is hosting the Ultra session, open a new browser window to use for shared content.
  • If multiple browsers are available, use one to host the session, and one to host the shared content.




Keywords:ultra, collaborate, tunnel, effect, webinar, bbc   Doc ID:73544
Owner:Linda W.Group:UW Parkside
Created:2017-05-25 10:22 CDTUpdated:2021-05-03 14:07 CDT
Sites:UW Parkside
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