Which option is NOT a step in customizing margins?

The process of customizing margins primarily involves working directly with the Page Layout settings within a document. This entails accessing the Page Layout tab, where you can find options to modify the values for the top, bottom, left, and right margins. After adjusting these values to your preferences, clicking OK finalizes and applies these changes to the document layout.

Clicking on the print settings is not a step directly related to customizing margins within the document itself. Print settings are typically concerned with how the document will be printed, such as choosing a printer, selecting paper size, and adjusting orientation. While print settings might influence how the margins appear on a printed document, they do not directly contribute to the process of customizing margins as established within a document's layout settings. Therefore, this option stands out as separate from the core steps involved in customizing margins, making it the correct choice in the context of the question.