10 screen sharing best practices for safer meetings

Screen sharing is now such an ordinary part of work that hardly anyone prepares for it. You click Share screen, pick something from the list, and start talking. Most of the time that’s fine. Then one day a message preview slides in mid-demo, or a colleague asks what that other tab was, or you watch the recording back and notice a customer’s email address sitting in the corner for twenty minutes.

None of the habits below are complicated. Most take a few seconds. Together they make the difference between a share that shows exactly what you meant to show and one that shows a bit more.

Every major meeting tool lets you choose what to share. Zoom, Microsoft Teams and Google Meet all offer a single window as well as the whole screen, and when you share from Chrome or Edge you can share a single browser tab.

Pick the smallest thing that does the job. An entire screen shows your other windows, your dock or taskbar, your desktop files and every notification. A window shows only that app. A browser tab shows only that page: switch to another tab and the people on the call keep seeing the one you shared.

The catch is that a window or tab is only as private as what’s inside it. Sharing your inbox window still shares your inbox. Keep that in mind for the rest of this list.

Notifications are the most common screen-sharing accident, because they come from apps you aren’t even looking at. A chat preview, a calendar invite or a text forwarded to your computer can all appear on top of what you’re presenting.

Turn on Do Not Disturb yourself before the call: Focus on a Mac, Do not disturb on Windows. Don’t rely on automatic rules. Windows, for example, can silence notifications when you duplicate your display to a projector, but sharing a window in a video call doesn’t count. If you share a single window or tab, system notifications aren’t captured, which is one more reason to prefer it.

3. Close what you don’t need

Before the call, close the apps, documents and tabs that have nothing to do with it. It takes a minute and removes most of what could go wrong: the half-written email, the spreadsheet with salaries in it, the support ticket for a different customer.

If you share your whole screen, look at your desktop too. File names like “Offer letter – J. Patel.pdf” are visible to everyone, and so is a browser’s bookmarks bar.

4. Use a separate browser profile for presenting

Your everyday browser knows a lot about you. Start typing in the address bar and it suggests sites from your history. Click a form field and it offers your saved addresses. Every site you’re signed into is one click away.

Chrome and Edge both let you create a second profile with its own history, bookmarks and sign-ins. Keep one just for demos and calls, signed into only what you need to show. Autocomplete then has nothing embarrassing to suggest, and an accidental click won’t open your personal email.

5. Tell people what you’re about to show

Say what you’re going to share before you share it, and say when you stop. It helps people follow along, and it gives anyone who sees a problem a chance to speak up: “Before you share that, the client is on this call.”

Ask before you record, and ask before taking remote control of someone else’s screen. If the people on the call are customers, check whether your company has rules about what can be shown or recorded, especially in healthcare, finance and support.

6. Make it easy to follow

A screen that’s readable on your monitor is often unreadable as a small video on someone’s laptop. Zoom the page in with Ctrl and + (Cmd and + on a Mac) before you start, keep your mouse still when you’re not pointing at something, and move between pages slowly enough for people to see where they are.

Show one thing at a time. If you need to refer to something else, say so, switch to it deliberately, and switch back.

7. Test before it matters

The first minute of many calls is spent on “can you see my screen?” Test sharing once with a colleague, or join your own meeting from a second device, before an important call.

On a Mac, the meeting app or browser needs screen recording permission in System Settings → Privacy & Security before it can share anything, and macOS often asks you to restart the app after granting it. Finding that out five minutes before a client demo is stressful. Check which display you’re sharing too if you have more than one.

The most common screen-sharing mistake isn’t something you showed on purpose. It’s the share you forgot to stop. The meeting moves on, you switch to your email to find something, and everyone watches you read it.

Make stopping the share part of finishing what you were showing, the same way you’d close a presentation. Most meeting tools show a banner or a coloured border while you’re sharing; get used to looking for it.

9. Hide what you can’t close

Everything above reduces what’s on screen. It doesn’t help with the data on the page you actually need to show: the customer record you’re walking through, the dashboard with real names in it, the inbox you’re using to demo a feature. Test data is the ideal, but in support calls, sales demos and troubleshooting sessions the real page is often the only one there is.

This is where a blurring tool earns its place. Smart Blur is a browser extension that blurs personal information on the page itself, on your computer, before anyone on the call sees it. Nothing is uploaded and there’s no account. The core features are free:

Patterns blur email addresses, phone numbers, card numbers, US Social Security numbers, IBANs, IP addresses and API keys automatically, as the page loads and as new content appears. You can add your own patterns for things like order or account numbers.

Keywords to hide blurs specific names or words wherever they appear, such as other clients’ names, a project code name or a colleague’s email. See hide client names when screen sharing for how that works in practice.

Click, Draw and Text cover anything else: click an element to blur it, drag a box over a region, or select a piece of text.

Tab names hides the titles and icons in your browser’s tab bar, which often give away more than the page itself. See hide tab names when screen sharing.

Smart Blur Pro adds Local AI, which finds names and addresses written in ordinary sentences that patterns can’t catch, and runs entirely on your computer. It also adds Share Shield, which switches blurring on as soon as you start sharing from the browser, so it doesn’t depend on remembering.

Smart Blur works inside the browser, on Chrome, Edge and other Chromium browsers. It can’t blur desktop apps or system notifications, so the earlier steps on this list still matter.

10. Blur before you record or screenshot, not after

Recordings and screenshots outlast the call. A recording can be paused on any frame, and a screenshot pasted into a ticket or a chat travels further than anyone intends.

Editing data out afterwards is slow and easy to get wrong: blurring a recording means going through it frame by frame, and one missed frame undoes the rest. It’s far easier to have the blur in place before you press record. Because Smart Blur blurs the page itself, anything you capture, with your meeting app’s recorder or your computer’s screenshot tool, shows the blur too. Smart Blur Pro also has a Screenshot button that captures the visible area or a region you select, already blurred.

Make it a habit

You don’t need all ten every time. For most calls, sharing a tab instead of your screen and turning on Do Not Disturb removes most of the risk. For calls where real customer data has to be on screen, add the blur, and check the result once with a test share or a screenshot, looking at it the way someone else on the call would.

If you share messaging apps, the same ideas apply there: see the guides for WhatsApp Web, Telegram Web and Google Messages.