Share screens in Zoom

If you are on a Mac and have the Catalina OS or newer and will need to screenshare in Zoom or BigBlueButton, please follow the steps in this video to enable screensharing.

This article only applies to Zoom accounts that are managed by Online Learning.
If your class meets virtually–but your meeting links are not sent by–then the settings for your Zoom meetings may be different.
For questions about Zoom meetings that aren’t managed by Online Learning, please contact the Zoom account owner (possibly your program) or CIIS IT at

This guide describes using the Zoom desktop client on a computer (Macintosh or Windows).

For details about other devices, as well as the latest information, please see the Zoom Help Center.
What can I do in advance?
It is recommended to download and install Zoom on your device if you haven’t already. If using a web browser, please use Chrome only. Verify that your browser is up-to-date. For more information, see the Canvas Community article here.
Please check your Chrome settings to allow webcam and microphone access. Make sure that blindsidenetworks and Zoom don’t appear in the “Blocked” category for Mic. Do the same for Webcam.

Additionally, if you are on a Mac and have the Catalina OS or newer, please follow the steps in this video to enable screensharing.
If you encounter audio issues, check that Bluetooth headphones are not inadvertently connected (e.g. AirPods). For a demonstration of testing your audio, watch this Zoom support video (end at 1:09).
If you have a presentation file to share you may wish to save it as a PDF (File > Save as Adobe PDF in Windows or File > Save As > PDF > Save on Mac). Email it to the class in advance in case they need to open it on their end. (If you don’t have everyone’s email address handy, you can use the Canvas Inbox feature and attach it to a message to your entire class.) Presentations that are saved as a PDF won’t include dynamic transitions, video, etc. (only text, hyperlinks, and static images such as photos).
If you will be showing a YouTube video, PDF, or other media, you can have it open and ready before you present.
Important note
Virtualized courses are not recorded based on university policy and federal (HHS HIPAA & FERPA) and state regulations. Virtualized courses are for synchronous (simultaneous) attendance only. Student attendance is required, and the university’s attendance policy applies.

For immediate assistance during a virtual course meeting, please visit

For security reasons, Participants are not automatically allowed to screenshare.

To allow Participants to screenshare, the Host can update options from within a meeting. Please see the Allow Participants to screenshare in Zoom (Host only) article. 

  1. To share your screen open the file that you wish to share.
  2. In Zoom, click Share Screen:Zoom layout with the Share Screen button highlighted in the middle of the Zoom toolbar.
  3. A dialog box will open. Click the image of the content you wish to share. If you wish, you can select the default image, called Screen (Windows) or Desktop 1 (Mac). This will display the entire contents of your screen, making it easier to screenshare among different apps.
    1. If you will be presenting audio/video to the rest of the class, checkmark Share computer sound (otherwise they cannot hear the media) and Optimize Screen Sharing for Video Clip.
    2. Click Share.
      Window called Select a window or an application that you want to share. The first image is highlighted, at the top left. At the bottom left, Share Computer Sound and Optimize Screen Sharing for Video Clip are highlighted checkboxes. At the bottom right, the Share button is highlighted.
  4. Your screen will be shared immediately. If you had chosen to share your entire screen, navigate to the item you wish to share. Everything you see that is outlined in green is being shared to others.
    1. If others have trouble hearing your shared video, check your microphone input:
      1. Click the arrow at the right of the Mute button, then under Select a Microphone choose Same as System:Arrow at the right of Mute button in Zoom dashboard with a menu. Same as System is highlighted in the menu.
      2. Remember to return the selection when you are finished screensharing.
  5. To stop sharing, click Stop Share.

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