RectangleMirror Download

Share a portion of your screen in Zoom

Zoom has a built-in option for this, and there is a second way that behaves the same in every meeting app. Both are below.

Zoom's own option

In a meeting choose Share Screen, open the Advanced tab and pick Portion of Screen. Zoom shows a frame that you drag and resize over the part to share. It works well when Zoom is the only app you meet in.

A mirrored region, shared as a window

  1. Open RectangleMirror's menu and switch on Mirroring. Choose a third, a half, or a region you drew and saved.
  2. In Zoom choose Share Screen and, on the Basic tab, pick the window named RectangleMirror.
  3. Select Share.

When the second way is the better one

Download on the Mac App Store

Free for 14 days, then from $0.99 a month. macOS 14 or later.