Screen sharing lets you show slides, documents, a browser, or your whole desktop to everyone in the meeting — essential for presentations, demos, and online teaching. This guide covers how to share your screen on laptop and phone, share only one window, include computer sound, and fix the "host has disabled participant sharing" message. National IT Service helps Indian teams get the right Zoom plan and settings.
Step 1 — Click Share Screen: In the meeting toolbar, click the green "Share Screen" button. A window shows everything you can share: your full desktop, a specific application window, a browser tab, or a whiteboard.
Sharing one window (not the whole desktop) keeps notifications private
Close personal chats before sharing your full screen
Step 2 — Choose what to share: Select your Desktop to show everything, or a single app (e.g. PowerPoint, Chrome) to show only that. Click "Share" in the bottom-right. Everyone now sees your selection with a green border around what's shared.
Pick the exact PowerPoint window so slides fill the screen
Use "Whiteboard" to draw and explain live
Step 3 — Share with sound and video: If you're playing a video or audio clip, tick "Share sound" and "Optimize for video clip" at the bottom-left of the share window before clicking Share. This sends clean audio and smooth video to participants.
Forgetting "Share sound" is the #1 reason people can't hear your video
Optimize for video clip prevents choppy playback
Step 4 — Annotate and stop sharing: While sharing, a toolbar appears at the top: use "Annotate" to draw on screen, "Remote Control" to let someone control your screen, and "Pause Share" to freeze it. Click the red "Stop Share" to end.
Annotation is great for pointing things out in class or demos
Pause Share while you switch tabs so guests don't see the shuffle
Step 5 — Share from a phone: On mobile, tap "Share" (or "Share Content"), then choose Screen, Photos, a document, a website, or a cloud file. For full-screen sharing, tap "Screen" and "Start Broadcast".
On iPhone, allow Zoom in Screen Recording settings the first time
Sharing a specific photo/doc is simpler than full-screen on mobile
Frequently Asked Questions
Why does it say "Host has disabled participant screen sharing"?
The host restricted sharing to themselves. If you're the host, click the "^" arrow next to Share Screen > "Advanced Sharing Options" > set "Who can share" to "All Participants". If you're a guest, ask the host to enable it or make you a co-host.
How do I share a video with sound on Zoom?
Before clicking Share, tick "Share sound" and "Optimize for video clip" at the bottom of the share-selection window. Then choose the window with your video. Without "Share sound", participants see the video but hear nothing.
Can I share only one window instead of my whole screen?
Yes. In the Share Screen window, pick a specific application (like PowerPoint or Chrome) instead of "Desktop". Only that window is shown — your notifications, other apps, and personal tabs stay private.
How do I share my screen on the Zoom phone app?
Tap "Share" in the meeting, then choose "Screen" and "Start Broadcast" to share everything, or pick a specific photo, document, website, or cloud file to share just that. On iPhone you'll allow Zoom in Screen Recording settings the first time.
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