See Customize the Office Ribbon (It doesn't take rocket science)

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Graham Mayor - MS MVP (Word) (2002-2019)
Visit my web site for more programming tips and ready made processes www.gmayor.com

hi
yes i know this way to customize the ribbon, i was using it. However on the word document that I'm trying to edit, there is nothing (I can't modify it with the software)
So i think they modified it differently.
Also, when i'm saving the word document, the customize ribbon disappear (and that is a function that i would like to keep, it's a bit like an admin mode, only the people who has access to the main word template can use the customize ribbon, then when it's saved in docx, user can't use it).