RectangleMirrorShare a portion of your screen in Microsoft Teams
Teams on the Mac lets you share a screen or a window. To share a region, mirror it into a window first.
The steps
- Open RectangleMirror's menu and switch on Mirroring. Choose the region: a third, a half, or one you draw.
- In the Teams meeting select Share.
- Under Window, pick the window named RectangleMirror.
- Present as usual. Anything inside the region is shared; the rest of your desktop is not.
Tips for Teams
- If RectangleMirror is missing from the window list, check that Mirroring is on, then reopen the share tray.
- The first time, macOS asks Teams for Screen Recording permission too. Allow it in System Settings › Privacy & Security and restart Teams.
- For a slide deck, use Present a Window instead of a region: it shares just the slide, framed 16:9, with no title bar.
- To draw on the share, press ⌃⌥⌘A. The marks appear for everyone in the meeting.
Free for 14 days, then from $0.99 a month. macOS 14 or later.