The Read Mode provided in OneNote Gem – Favorites prevents keyboard input.
In OneNote Gem – Favorites, click “Navigation” tab -> “Gem” group -> Press “Read Mode” button.
OneNote goes into reading mode so that you can't enter characters through the keyboard.
However, you can still operate with the mouse.
If you want to restore the edit status, you can press the Read Mode button again, so you can use the keyboard to enter it.