Sharing your whole screen to show one document is the default and almost always the wrong choice.
Window share, not screen share
All three platforms let you share a single application window instead of the whole desktop. It is one extra click and it solves several problems at once.
Notifications do not appear. Your other tabs, files and Slack stay private. And the encoder has a smaller, more static region to compress, so text stays sharper at the same bandwidth.
| Platform | How |
|---|---|
| Zoom | Share Screen, then pick the reader window from the list |
| Teams | Share, then Window, then the reader |
| Google Meet | Present now, then A window |
The one thing to check first is that the document is already open. All three list only windows that exist when you start sharing, and switching mid-share is more disruptive than opening it beforehand.
Make the text readable at video resolution
A screen share is compressed video. Text that is comfortable on your monitor is often unreadable on someone else's laptop after that compression, particularly on a poor connection.
- Zoom the document to 150% or more. The most effective single change, and the one people skip because it looks large to them.
- Full-screen the reader. Toolbars and sidebars waste the frame on interface nobody is reading.
- Enable the "optimise for text" option where the platform offers it. Zoom has it behind Advanced; it prioritises sharpness over frame rate, which is the right trade for a document.
- Scroll slowly. Fast scrolling forces the encoder to re-send the whole frame and everything goes soft for a second.
If a table or a diagram genuinely will not read at video resolution, do not fight it — send the file and let people open it locally. A screen share is not the only channel available.
Sharing so people can keep it
A screen share is ephemeral. Nobody can scroll back, search it, or refer to it after the call, and anyone who joins late has missed it.
Every platform has in-meeting chat that accepts files, and it is the right companion to a share rather than an alternative to it.
- Zoom — Chat, then the file icon. Off by default in some accounts, so test before the meeting rather than during it.
- Teams — attach in the meeting chat; it lands in the associated SharePoint folder and persists after the call.
- Google Meet — no file attachment in chat, only links. Share a Drive link and check the permissions first, or half the room gets a request-access screen.
That Meet permission problem is the most common live failure in this whole subject. "Anyone with the link can view" before the meeting starts, every time.
Before the call
Three things that take two minutes and prevent the usual scramble.
- Check the size. Chat attachments have limits, and a 40 MB deck fails to send in front of everyone. Compress PDF at 150 DPI usually takes a scanned document down by 60–80%.
- Send only the relevant pages. A 200-page report where the discussion is chapter 4 wastes everyone's time. Split PDF extracts it in seconds.
- Open the document and set the zoom before sharing, not after. Doing it live is visible and slow.
- Have a fallback. If the share fails, having the file already in the chat means the meeting continues.
Recording and privacy
If the meeting is recorded, whatever you share is recorded too — and it goes wherever the recording goes, which for Teams and Zoom cloud recordings is a retention policy you may not control.
Sharing a document containing personal data, salary information or an unreleased financial position into a recorded meeting puts a copy of it in that archive indefinitely.
Worth a moment before sharing anything sensitive: ask whether the meeting is recording, and consider whether the relevant pages alone would do. A window share also protects you from the second-order version of this — an email preview or a notification appearing on your desktop and being recorded permanently.
Frequently asked questions
Should I share my screen or just the window?
The window. It hides notifications, keeps your other work private, and gives a sharper image because the encoder has a smaller static region to compress. Open the document before you start sharing — all three platforms only list windows that already exist.
Why is my shared PDF blurry for other people?
Screen sharing is compressed video, so text comfortable on your monitor degrades on theirs. Zoom the document to 150% or more, go full screen, and turn on the text-optimisation option if the platform has one. Scroll slowly — fast scrolling forces a full re-encode.
How do I send a PDF in a Zoom meeting?
Open Chat and use the file icon. It is disabled by default in some accounts, so test it before the meeting rather than discovering it live. Screen sharing shows the document but leaves nobody with a copy.
Can I attach a file in Google Meet chat?
No — Meet chat takes links only. Share a Drive link, and set the permissions to "anyone with the link can view" before the meeting starts, or a good portion of the room will hit a request-access screen while you wait.
What if the file is too big for chat?
Compress it, or send only the pages under discussion. At 150 DPI a scanned document typically loses 60-80% of its size with nothing visible gone, and a 200-page report where you only need chapter 4 was never worth sending whole.
Is it safe to share a confidential PDF in a recorded meeting?
Consider it carefully. Whatever you share is captured in the recording and stored under a retention policy you may not control. Sharing only the relevant pages limits the exposure, and a window share prevents notifications being recorded alongside it.