Select a region quickly
Drag out the exact part of your screen you want to present, or start instantly with a saved region using a global keyboard shortcut.
RegionMirror
RegionMirror is a macOS screen-sharing app for presenting a selected region of an ultrawide or large display in Zoom, Teams, Slack, Discord, and similar apps.
Share a focused part of your Mac screen
RegionMirror is a native macOS app for sharing a selected region of an ultrawide or large display instead of presenting the entire screen or a single window. It is aimed at people who need to keep a large desktop available while showing only the part of the screen that matters to an audience.
The workflow is intentionally simple: select or save a region, keep working across the rest of your desktop, then share the RegionMirror window in a conferencing or collaboration app. The product adds built-in presentation tools such as annotations, blur, and a whiteboard so the same shared region can support demos, teaching, and walkthroughs without switching tools.
Built for readable region sharing on macOS
Saved regions and hotkeys
Save a default region for each display and trigger it with a customizable shortcut such as ⌃⌥⇧+1, so you do not need to redraw the area every time.
Share without restarting
Keep working normally while presenting: move windows into and out of the shared area, resize the region, or switch apps without stopping the share.
Share through your meeting app
Use the RegionMirror window like any other macOS app window in Zoom, Teams, Slack, Discord, and similar tools that support window sharing.
Presenting tools in one place
Annotate the shared area with arrows and text, blur it when you need to type sensitive information, or switch to a built-in whiteboard for live explanation.
Presenter View preview
See a compact live preview of what your audience sees from Presenter View, so you can check framing while staying on your own desktop.
Common ways to use RegionMirror
Developer walkthroughs
Present code, terminal output, and documentation in a single readable frame while leaving the rest of the IDE and reference material visible on the same monitor.
Sales and product demos
Move between a product demo, slides, and browser tabs without stopping the share, while keeping private notes off-screen.
Training and instruction
Teach with arrows, text, and the built-in whiteboard while switching among reference material and live examples.
Consulting and client reviews
Show dashboards or reports at a readable size, then blur the shared view briefly when entering credentials or other sensitive data.
Remote team meetings
Use one workflow across meetings: choose a region, share the RegionMirror window, and continue working in whatever app your meeting invite uses.
Pros and Cons
Pros
- Shares a chosen region instead of the whole ultrawide screen, which helps keep the audience view readable.
- Works as a normal macOS window inside tools that support window sharing, rather than requiring a separate meeting integration.
- Supports saved regions and global shortcuts for faster repeat use.
- Includes annotations, blur, and a built-in whiteboard for presenting in one place.
- Keeps the rest of the desktop private while presenting.
Cons
- The app requires macOS 13.5 or later.
- After the trial, the shared region is limited to 1080×720 unless you make the one-time purchase.
FAQ
Does RegionMirror work with Zoom and Microsoft Teams?
Yes. RegionMirror shows the selected region in a normal macOS window, which you can share in Zoom, Microsoft Teams, Slack, Discord, or other apps that support window sharing.
Do I need an ultrawide monitor?
No. The product is most useful on large and ultrawide displays, but it also works on any Mac display running macOS 13.5 or later.
Can I share multiple apps at once?
Yes. Anything placed inside the selected region is shared, so you can arrange multiple windows in that area and move apps in or out while presenting.
Does the rest of my desktop stay private?
Yes. Only the selected region is shared, and the app provides an on-screen outline plus a blur control for moments when you need to enter sensitive information.
How does the free trial work?
RegionMirror is free to download and unlocks every feature for 7 days or 10 sharing sessions, whichever comes first. After the trial, sharing continues with a 1080×720 region, and a one-time in-app purchase of $19.99 unlocks custom region sizes, annotations, blur, and the whiteboard.
Quick Facts
- Category
- Productivity / Developer Tool
- Platform
- macOS
- OS requirement
- macOS 13.5 or later
- Primary use
- Share a selected region of an ultrawide or large display
- Pricing
- Free to download; one-time in-app purchase of $19.99 after trial
- Domain
- regionmirror.com
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