Word – Green Highlighted Text in Word 2016

I created a word document at home, and edited some of it at school, then at school saved the document to my OneDrive.

Now that I have got home from school and loaded up the document from my OneDrive, it shows all of the work I added at school. But has highlighted any new stuff in green, and I can't find a way of removing the green highlight.

To be clear the Microsoft Account that I signed into to access the document was my personal one, but Word was signed into my school Microsoft Account.

So how do I turn this feature off?