Answer:
page layout Tab
Step-by-step explanation:
once you want to adjust the margins on a page you will have to navigate to the page layout Tab then under the page layout Tab navigate to the page setup group under the page setup group click on margin then select the margin type that you want.
the margin type selected will affect the whole margin of the page you changed it for and then you can continue typing and the new word will be within the new margin. this is very common practice in word processing documents.