Share a specific application window

I need to show only the lesson slide deck to the class, not my email or notes. Start presenting the PowerPoint window titled 'Week 7 — Circuits' and make sure participants see just that single app. Keep gallery view visible to me, and stop screen sharing if I close that window. Confirm when it’s live.

Before I present to the hiring panel, surface the app window named 'Candidate Demo' first, hide my messaging and browser windows, and make the shared window clickable for attendees so they can follow links. Flag any open windows that might pop into the share and suggest the quickest way to isolate the demo window only.

I clicked the app window to present the prototype, and five minutes in someone shouted that my inbox was visible. I’m mortified and worried about private data leaking. Which accidental sharing options likely caused this, what immediate steps stop further exposure, and how do I check the recording and who already saw it?

Across a dozen product demos I keep accidentally sharing the wrong window when I alt-tab. It costs credibility every time. Which habitual prep or presentation setup will prevent this, and how do I train guest presenters to follow it so demos stop leaking private windows?