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Microsoft Teams: Multiple screen shares in Teams Rooms on Windows
Teams Rooms on Windows will support viewing up to two shared screens side-by-side during meetings. This feature is available with Teams Rooms Pro and reduces disruption from screen handoffs.
Microsoft's description
You can now view up to two shared screens side by side during meetings, reducing interruptions from screen hand-offs. Participants can switch between side-by-side and expanded views, identify presenters for each screen, and benefit from layouts optimized for single or dual displays. Available with Teams Rooms Pro.