I use Onenote all the time but mostly just for basic stuff like text and pictures and links.
An annoying thing started a few weeks back.
My default font for typing is Calibri 11 plain but when I press enter to type more text on the next line it automatically changes to Calibri 14 Bold!
This only happens when I press the enter key to start a new line.
Please stop me tearing my hair out, there's not much of it left now.
using
Windows 10
Onenote (for Windows 10) Version 16001.11727.20076.0
