Hello عمرو احمد محمود غباره,
Thank you for posting your question on Microsoft Q&A forum
I can see that you are experiencing performance issue with OneNote app on Window 10, whereas significant lag happened, occasional “Not Responding” messages appeared and delays when you write with a pen.
Here is what you can do to improve your OneNote performance:
Disable background features in OneNote that affect pen latency:
- In OneNote > Settings > Options and turn off:
- Automatically save and back up
- Ink effects (critical)
- Convert handwriting to text automatically
- Enable math assistance
- Enable spellcheck while handwriting
These options add processing during pen input, not after. Slowing down your OneNote.
Also, try reducing the ink rendering load, still in Options:
- Set Pen thickness to the smallest usable value
- Avoid pressure-sensitive pens if possible
- Use solid colors only (no glow, pencil, or effects)
Visual pen effects are rendered in real time, this is also a major lag source.
Feel free reply back to this post if you need further assistance, I'll be happy to help.