Screen sharing to a big room: what to make bigger on your Mac

When you share your Mac’s screen to a big room, make the text bigger first, then the pointer, then everything else people need to follow: the menu bar, the Dock and any keys you show on screen. Find out what resolution the projector or room screen runs at, because your picture gets squeezed to fit it, and set up accessibility Zoom so you can blow up a detail when you need to.

Below, roughly in the order to do them, with where to find each setting on macOS Sonoma and later.

Start with the projector, not your Mac

Your Mac’s display probably has far more pixels than the projector in a meeting room. When you mirror, both show the same picture, so it is scaled to fit the projector. Text that is crisp on a Retina display can turn soft and thin on a wall, and it is shown to people sitting much farther away than you.

Connect early, open System Settings > Displays, select the projector and look at what it offers. If there is a row of sizes, the ones toward Larger Text make everything bigger. If you see a list of resolutions instead, a lower one makes everything bigger. Then walk to the back of the room, or ask someone there, and read a menu.

Sharing to a meeting room screen through a call app adds a step: your screen travels as compressed video and is shown at whatever size the room’s layout gives it. The same settings help, and the test is the same: look at it where the audience will.

Scale the whole screen

The biggest single change is the screen size in Displays. Picking a size toward Larger Text makes text, windows and menus bigger together, in every app, with no per-app settings to remember. The cost is space: less fits, so close sidebars and inspectors you do not need for the talk.

If the presentation is only part of your day, set it before you share and put it back afterward. Nothing else changes.

Make text bigger in the apps you show

On top of the screen size, most apps can enlarge their own content:

• Safari and Chrome. Command-Plus (⌘+) zooms the page, and Command-0 puts it back.
• VS Code. Command-Equals (⌘=) zooms the whole window, from View > Appearance > Zoom In.
• Terminal. View > Bigger, repeated until the back row can read the prompt.
• Finder. View > Show View Options (Command-J) has Text size and Icon size settings for the window you are in.
• Apps that follow the system text size. In System Settings > Accessibility > Display, Text size sets a reading size for the apps listed there, each of which can also be set on its own.

Two more in Accessibility > Display are easy to miss:

• Menu bar size can be set to Large, which makes the menu bar text bigger. The change can need a log out before it shows everywhere, so do it the day before.
• Increase contrast makes borders and controls stand out more, which helps on a washed-out projector.

The Dock has its own Size slider in Desktop & Dock. If the room needs to see you click in it, make it bigger there.

Light mode often reads better than dark mode on a projector in a lit room, because the projector cannot make black any darker than the wall. If your slides or app are dark and hard to read, try System Settings > Appearance > Light before the talk.

Make the pointer easy to follow

The pointer is how you say “here” to a room. At the default size it is easy to lose on a projector.

1. Open System Settings > Accessibility > Display.
2. In the Pointer section, drag Pointer size to the right.
3. Set Pointer outline color to something bright, so the pointer stands out against both light and dark windows.
4. Turn on Shake mouse pointer to locate, if it is off. Shaking the mouse then makes the pointer bigger for a moment.

Move it slowly and stop on the thing you are talking about. Make the Mac pointer bigger and easier to find has more detail.

For a room, Typebar adds pointer effects. While its overlay shows, click ripples make every click visible and a cursor halo, a circle that follows the pointer, keeps it easy to find. Spotlight dims everything except a circle around the pointer when you want every eye on one spot. It has its own shortcut: press it to turn Spotlight on mid-sentence, or hold it to show Spotlight only while you hold.

Zoom in on a detail

Some things stay too small at any screen size: a toolbar icon, a setting in a dense panel, a line of code. macOS has a zoom built in for this. Open System Settings > Accessibility > Zoom and turn on:

• Use keyboard shortcuts to zoom. Option-Command-8 (⌥⌘8) turns zoom on and off, Option-Command-Equals (⌥⌘=) zooms in and Option-Command-Minus (⌥⌘-) zooms out.
• Use scroll gesture with modifier keys to zoom. Hold Control and scroll to zoom in on the spot under the pointer, which is the quickest way to show one detail and come back out.
• Zoom style. Full Screen magnifies everything; Picture-in-Picture shows a magnified box around the pointer, so the room still sees the rest of the screen and keeps its bearings.
• Hover Text. Hold Command and point at a word or control, and a large copy of its text appears.

Try zoom during your setup check and look at what the room actually sees, on the projector or through the call app on a second device, rather than assuming it matches your own screen.

Make on-screen keys big enough for the back row

If you show the keys you press, they need the same treatment as your text. A keystroke display sized for a 1080p recording is usually too small for a hall.

In Typebar, each mode (Keyboard, Pill, or both) has its own size and place on screen, and a profile keeps sizes and places, so a presenting setup can have a large pill without changing the one you record with. Drag it by its handle to a part of the screen your demo does not use.

For a big room, the pill usually reads better than the full keyboard. It names each shortcut with the name it has in the app’s menus, such as “⇧⌘4 Screenshot Selection”, so people at the back read the action in words even when the key symbols are hard to make out. Give it strong contrast and save the whole setup as a profile. The ready-made Presenting profile is a starting point, and a profile can switch on by itself when a chosen app comes to the front. How big should on-screen keys be in a 1080p or 4K recording covers sizing for video, and Demoing a Mac app at a meetup or conference has a full pre-talk checklist.

Typebar is $9 once for up to five Macs, and free for 24 hours with everything on.

Questions

What resolution should I use when presenting from a Mac?

Whatever makes text readable from the back row. Start with an option toward Larger Text in System Settings > Displays, look from the back, and go larger if you have to squint.

How do I zoom into part of the screen during a presentation?

Turn on Use scroll gesture with modifier keys to zoom in System Settings > Accessibility > Zoom, then hold Control and scroll. Or turn on the keyboard shortcuts and press Option-Command-8.

How do I make the mouse pointer bigger on a Mac?

System Settings > Accessibility > Display, then drag Pointer size in the Pointer section. A bright Pointer outline color helps too.

Will these changes stay after the talk?

Yes, until you change them back. Note what you changed, or put each setting back as soon as you stop sharing.