How to freeze and annotate your screen on a Mac

Freezing and annotating are two problems

They get talked about together and they are not the same thing:

• Freezing stops the screen so a detail stays put while you talk about it. Useful when the content moves on its own – a log streaming, a video playing, a dashboard refreshing – or when you need to switch away without losing the thing on screen.
• Annotating puts marks on top: a circle, an arrow, a highlight, a measurement.

macOS covers annotating a captured image well. It does not cover freezing the live screen at all, and it has no system-wide layer to draw on live content. Everything below follows from that split.

The free way: screenshot plus Markup

1. Press ⇧⌘4 and drag over the area, or ⇧⌘3 for the whole screen.
2. A thumbnail appears in the bottom-right corner for a few seconds. Click it before it disappears.
3. Markup opens: pens, highlighter, shapes, arrows, text, a signature tool and a colour picker.
4. ⌘C copies the annotated result, or Done saves it.

That thumbnail is the part people never click, and it is the whole feature. Miss it and you have a file on your desktop instead of an annotation session.

Markup's shape tools are better than they look: draw a rough circle or arrow freehand and macOS offers to snap it into a clean one. For anything you are going to send to someone, this is usually enough, and it is free.

Two limits. It produces an image – you are no longer looking at your screen, you are looking at a picture of it. And there is a gap between pressing the shortcut and having something to draw on, which on a live call is dead air.

Quick Look as a poor man's freeze frame

A trick worth knowing: take a screenshot, select the file in Finder, press Space for Quick Look, then put it full screen. You now have a frozen copy of your screen that you can talk over, and Markup is available in the Quick Look toolbar.

It is clumsy – several steps, a Finder detour, and your audience watches you do all of it – but it costs nothing and it works when you need a still of something that will not stay still.

Annotation inside Zoom, Meet and Teams

If your only goal is drawing during a call, check the call app first. You may not need anything else.

• Zoom: annotation over shared content for the presenter, and for participants when the host allows it. Pen, highlighter, shapes, arrows, text, a spotlight pointer and an eraser, plus a save button.
• Microsoft Teams: annotation over shared screens, with a shared whiteboard alongside it.
• Google Meet: annotation over presented content, with a smaller toolset than the other two.

What you get: it is free, it is already installed, and participants can draw too, which is genuinely useful in a workshop.

What you do not: the marks live inside that call only. They are not in a local recording made outside the app, not in OBS, and not available when you are recording a tutorial with nobody on the other end. And none of these can freeze the underlying screen – if the content moves, your arrow is now pointing at the wrong thing.

The iPad and Apple Pencil route

With Sidecar, your iPad becomes a display for your Mac, and the Apple Pencil becomes a real pen on it. Drag the window you are discussing onto the iPad and mark it up in an app that accepts pencil input.

For handwriting-heavy teaching – maths, diagrams, marking up a design – nothing on a trackpad comes close. The trade-off is that it only covers what you moved onto the iPad, and it is a two-device setup you have to prepare in advance.

What a dedicated freeze-and-draw tool adds

The gap all of the above leaves is the live one: stop this screen, right now, without a file, without a Finder trip, and draw on it in front of an audience.

Tools built for this hold the current frame in place and put an ink layer over it. The ones worth looking at differ in what they add around that core – some are annotation-first, such as Presentify or ScreenBrush; Gaze comes at it from the zoom side, so freezing and drawing sit next to a magnifier that lands in recordings.

What that combination buys you in practice:

• Zoom in, then freeze. Push in on the detail, stop the frame, circle it. The audience sees the thing large and still.
• Ink, shapes and a ruler over the frozen frame, with pressure smoothing so a trackpad line does not look like a seismograph.
• Copy or save with the marks baked in, so the annotated frame goes straight into a ticket or a message.
• A pinned lens as the alternative to freezing: lock a magnified region in place and keep working underneath it, which is what you want when the thing being watched has to stay live.

Straight about the cost: this is a paid category. If you annotate twice a month, ⇧⌘4 and Markup is the right answer and you should not spend anything.

Which to use when