Enable Inactive Scrolling
Windows 10 introduced a new native feature to allow scrolling on windows that were not in focus, ie inactive. https://www.thurrott.com/windows/windows-10/2435/windows-10-tip-scroll-inactive-windows
Inactive scrolling does not work for OneNote!
Repo: Open OneNote and pin to one half of screen. Open another application and pin to other half of screen. While other application is in focus, hover mouse over OneNote window and scroll.
Expected: Expected OneNote to scroll even though inactive
System: OneNote 2013 15.0.4787.1000, Windows 10 Pro Version 1511
We are pleased to inform you that this behavior is currently supported both in OneNote 2016 and OneNote for Windows 10.
You should be able to scroll through your OneNote window regardless of whether it has focus or not.
Thank you for helping us shape OneNote!
-The OneNote Team