question

Yes, guest attendees can share their screen without registering for an Amazon Chime account as long as the meeting host has Pro permissions.

Using the web application

1. Join from the web application (https://app.chime.aws)
2. Choose Join a meeting without an account
3. Follow the steps to join provided in https://answers.chime.aws/questions/33/do-i-need-the-chime-app-to-join-a-meeting.html
4. Follow the information provided in https://answers.chime.aws/questions/762/how-do-i-share-my-screen-when-using-the-windows-or.html

Using the Windows or macOS clients

1. Download the client from https://aws.amazon.com/chime/trial or open your Amazon Chime client
2. Choose Join a meeting without an account
3. Follow the steps to join provided in https://answers.chime.aws/questions/33/do-i-need-the-chime-app-to-join-a-meeting.html
4. Follow the information provided in https://answers.chime.aws/questions/762/how-do-i-share-my-screen-when-using-the-windows-or.html