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Screen highlighter app for Mac

Lasso is a screen highlighter app for Mac. Draw a translucent highlight over a line of text, part of a slide or a row in a spreadsheet while the app is open. The text stays readable and your original file stays unchanged.

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Lasso’s yellow highlighter drawn across the pricing row of a Mac dashboard, with the text and page views still visible
A highlight drawn over a row in Lasso’s live screen demo.

How to highlight part of your screen on a Mac

  1. Open the slide, web page or app you want to highlight. With Lasso running, press Option–Shift–A (⌥⇧A) to enter drawing mode.
  2. Press H or choose Highlighter in the toolbar. Drag over the part of the screen you want to mark. Hold Shift while dragging to draw a straight highlight.
  3. Press Command–Z (⌘Z) to undo the last stroke, or Escape to clear your marks and finish drawing.

Show highlights in Zoom, Google Meet or Teams

Share the entire display you plan to draw on. Lasso puts marks in a layer above the app, so sharing one window or browser tab can leave the highlight out. Check the shared-screen preview before you start presenting.

In a traffic report, highlight a row across the page name and its view count so your audience can read them together. Use the pen to circle a single number, or press F to draw a fading laser pointer stroke when you only need to point for a moment.

Save your screen highlights as a screenshot

While drawing, press S to capture the display or Shift–S (⇧S) to select an area. Lasso includes the highlights in the image, which you can copy, save or drag into a message. Drawing works without Screen Recording permission. Capturing an image requires it.

Mac requirements and price

Lasso runs on macOS 14 Sonoma or later on Apple silicon and Intel Macs. A one-time payment of $9.99 USD including tax gives you lifetime access.