If you want to see a list of installed add-ins in OneNote 2016, click File > Options > Add-Ins.
However, major add-ins will come with an installer file that will install and configure OneNote automatically. The installation procedure for each OneNote add-in will vary. Unfortunately, the OneNote 2019 UWP app doesn’t currently support most add-ins, but you should be able to download OneNote 2016 for free.
If you want to add OneNote add-ins, you’ll need to use OneNote 2016 or earlier. To help supercharge your productivity, here are some of the best Microsoft OneNote add-ins and tools for you to try.
