Hi there! I see you’re experiencing slow performance in PDF Expert when working with a file that has many notes. To make sure I give you the best help, can you tell me a bit more? For example, is the slowdown happening when you open the file, scroll through pages, or when you try to add or edit notes? Also, is this file particularly large, or does it have a lot of complex graphical elements?

Meanwhile, I can share some general steps that often help with slow performance related to note-heavy PDFs:

1. Keep the file open for a bit: Sometimes PDF Expert takes a moment to fully load all notes and annotations in complex files, so keeping it open a little longer can help it stabilize.

2. Close other applications: Since you’re on Windows 10, ensure other high-memory apps are closed to free up RAM, as PDF Expert can use more resources with many annotations.

3. Optimize the PDF outside PDF Expert: Sometimes, PDFs with numerous notes or vector graphics can cause slowdowns. Using a PDF optimization tool to flatten or reduce annotation complexity can improve speed.

4. Update PDF Expert: Verify you have the latest version installed, as updates often include performance improvements and bug fixes.

5. Try opening the file in another PDF reader: To rule out file-specific issues, check if other readers (like Adobe Acrobat Reader) also experience slowness with the same file.

6. Reduce on-screen notes: If possible, hide or collapse note summaries or sidebars within PDF Expert to reduce on-screen rendering load.

If you’ve already tried some of these, let me know what you’ve done and what specifically slows down, so I can guide you with more advanced troubleshooting!