One great feature of Blackboard Collaborate Ultra is the ability to share content such as documents and files, your computer screen or an application on your computer, web pages, or a blank “whiteboard.” You can also conduct polling of participants and place them into breakout groups. Read here for details on how to share an Application (or your computer screen) with students.
To share content in Blackboard Collaborate Ultra you should have already inserted the tool link in the content area and created a session. Once you have done that you can join a session. In the session, you can share content.
Note: When you opt to share your entire screen, you may see a prompt asking if you want to share your entire screen. Share your screen.