Final answer:
Ruby can change the size of the margins in her document using the Page Setup command in her word processing software.
Step-by-step explanation:
Ruby can change the size of the margins in her document using the Page Setup command in her word processing software. This command allows her to adjust various settings for the page layout, including the margins. By selecting the Page Setup option, she can specify the desired margin size for her document.
Learn more about Changing margin size in a word processing software