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Slides, webinars, and meetings
Underline a figure, circle a trend, reveal one area at a time, or use the laser pointer while the slide or shared screen remains visible.
For presenters, trainers & demonstrators
Screen annotation tool for presentations
Draw over slides, highlight a result, focus attention, number steps, and explain software live without leaving your presentation or editing the original file.
Essential Pen, Eraser & Screenshot tools · No account required
Keep presentation controls available over slides, webinars, and demos.
Annotate liveOver slides and demos
Focus toolsSpotlight, curtain & laser
Capture resultsScreenshots, GIFs & recording
Free essentialsNo account to begin
Present without losing momentum
Keep attention on the content being discussed
Add context exactly where your audience needs it, instead of switching away from the slide, dashboard, website, or software interface you are explaining.
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Software and product demos
Point out controls, number a workflow, highlight a status, and guide viewers through an interface without changing the application underneath.
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Training and technical walkthroughs
Combine annotations, magnification, a timer, screenshots, and recording tools to make complex steps easier to follow and revisit.
A presenter toolkit on screen
Annotate, focus, pace, and capture
Use a quick mark when that is enough, or combine focus and capture tools for webinars, training sessions, recorded demos, and detailed walkthroughs.
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Pen, highlighter, shapes, text, and numbering
Mark a key idea, add a label, or turn a process into numbered steps while the source material remains untouched.
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Spotlight, curtain, and laser pointer
Guide attention to the exact section being discussed and temporarily reduce distractions elsewhere on screen.
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Magnifier, coordinates, and precision tools
Zoom into small details and explain technical diagrams, layouts, measurements, or on-screen positions more clearly.
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Session timer and step numbering
Keep a workshop on schedule and make multi-stage demonstrations easier for viewers to track.
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Screenshots, GIFs, and PDF export
Save an annotated result for meeting notes, training recaps, support documentation, or follow-up material.
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Creator Recorder (Beta)
Record the screen locally with microphone input and an optional creator-camera overlay for reusable presentations and tutorials.
Simple presentation workflow
Annotate a presentation in three steps
Test your chosen projector, screen-sharing, or recording mode once before the session so the overlay appears exactly as intended.
Open the presentation or demo
Prepare the slides, dashboard, website, document, video, or application you want to present, then launch OS Pen.
Choose the audience view
Start the projector, meeting, or recording with a mode that includes the screen-level annotation overlay.
Annotate, focus, and capture
Add temporary marks and focus cues as you speak, then clear them or save a screenshot when the explanation is complete.
Presentation questions
Frequently asked questions
How can I annotate during a presentation?
Open OS Pen above your presentation, choose Pen, Highlighter, Shapes, Text, or a focus tool, and annotate while the original content remains unchanged underneath.
Can OS Pen annotate PowerPoint, PDFs, browsers, and software demos?
Yes. OS Pen works as a screen-level annotation layer over presentations, documents, browsers, videos, desktop software, and other Windows content.
Can I focus attention without drawing on every slide?
Yes. Use Spotlight, Curtain, Laser Pointer, Magnifier, step numbering, and the session timer to direct attention without adding permanent marks.
Will viewers see the annotations in a webinar or recording?
That depends on the meeting or recording app's capture mode. Choose a mode that includes screen overlays and test it before presenting. Sharing the full display is often the clearest option.
Can I save an annotated presentation?
You can capture annotated results as screenshots, create short GIFs, export supported work to PDF, or use recording tools for a reusable walkthrough.
Make presentations easier to follow
Begin with free essential annotation tools, then compare plans when you need the complete presenter toolkit.