Handwriting
Use a stylus, moderate smoothing, and a stroke wide enough to survive screen sharing.
Pen and touch setup
Annotate a Windows touchscreen without fighting your input device
A stable display, calibrated pen, sensible stroke size, and deliberate palm placement make live annotation more predictable.
StylusBest precision for handwriting
TouchUseful for quick pointing and broad marks
MouseReliable fallback on any Windows PC
Write on the screen the way you would on paper
OS Pen (On-Screen Pen) turns a Windows touchscreen or pen display into a surface you can write on over any app. Pen, touch, and mouse input all draw on the same floating layer, so you can use whichever feels steadier for the lesson or demo in front of you.
Want to see every tool? Read the Windows screen annotation overview.
Start with Windows input settings
Confirm that Windows recognizes the pen or touchscreen before troubleshooting the annotation app. Test the pointer in a basic Windows surface, review display orientation and scaling, and install device firmware or driver updates from the computer or pen manufacturer when input is unstable.
Microsoft documents Windows pen shortcuts and the pen menu in its official Windows guidance. Hardware behavior differs, so use the device maker's calibration and palm-rejection instructions for the exact model.
Match the device to the task
Presenting
Use a mouse or pen with a pointer and short marks to keep motion controlled.
Touch display
Use larger toolbar targets and avoid resting the full hand on screens without reliable palm rejection.
A safe setup sequence
Connect the display or tablet before opening the annotation app. Select the correct monitor, test a few marks, clear them, and verify that the pointer aligns with the pen tip. If the system uses multiple monitors with different scaling, keep the annotation toolbar on the display being presented and retest after changing display mode.
OS Pen supports drawing over the Windows desktop with pen, touch, or pointer input as provided by the system. Its precision tools can help with geometry and technical explanations when freehand input is not enough.
Official sources checked
Microsoft: Use a pen with Windows
Hardware and software details change over time. Check Microsoft's and your device maker's current guidance before rolling out a setup.
Frequently asked questions
Do I need a stylus?
No. A mouse can annotate on any supported Windows PC, while a stylus is usually more comfortable for handwriting.
Why is the pen mark offset from the tip?
Check Windows display scaling, orientation, monitor selection, and the hardware maker's calibration tool before restarting the annotation app.
Can I use a touchscreen in a presentation?
Yes. Test palm rejection and toolbar placement before the session so accidental touches do not interrupt the workflow.
Try OS Pen on your touchscreen
Download it, pick up your stylus, and start with Pen, Eraser, and Screenshot, free and without an account.