I mistakenly shrunk my microsoft word paper size. How to fix?

My young child accidentally shrunk that microsoft concept page and also I don’t learn how to fix the item.The report size holds A4 but it surely is under 2 cm throughout length and it is impossible in order to type.Is there a method to reset the type and model or Ms Word It can be unusable presently.Any guide appreciated.

ctrl + “+”
ctrl + MSWHEELUP.