Set an area that cannot be edited in one page of word

[expert4knowledge]

Regarding my previous post:
https://www.msofficeforums.com/word/...er-margin.html


I created a cover page and it worked, but I want to know if there is any way that I set the margins for just first page, I want if some one started typing on the first page, he/she cannot type on some special areas of the page that there is some picture in the background, I thought to put some shapes but it does not work, since some one start to typing the shapes on the bottom of the page moves, also if there is a way to lock the shape we are solved then