As an application of the methods mentioned in Section 7.1, we can use CSS to adjust the alignment of headings. For example, you may center section headings of level 1, 2, and 3 with the CSS code below:

    1. h1, h2, h3 {
    2.   text-align: center;
    3. }

    Please see Section 7.1 on how to apply the CSS to your Rmd document.