In the backstage of word there are 2 views:
- First view : it's the one when you open word, with 3 main menus, namely Home - New - Open
- Second view: this is the one you see when you open an existing document. There are many more menus, including the 3 previous ones, but also the menus: Information - Save - Save as - Print - Export ... Close

I can put my personalized menu in the second view but not in the first.

Can anyone tell me how to put it in the first view?

I'm very sorry,
Davis