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Markdown doesn't support font size changes directly, but you can use HTML tags, inline CSS, or CSS classes to adjust text size and improve readability. Check specific platform documentation for details.

GitLab supports Markdown for creating rich documents with code blocks. You can use triple backticks for syntax highlighting, and GitLab offers features like collapsible sections and embedding external code to enhance document readability.

In GitLab Markdown, you can adjust image sizes by embedding HTML or using inline CSS. For example, use the <img> tag with width and height attributes, or set image dimensions with the style attribute. This makes Markdown documents more visually appealing and easier to read.

Headers in R Markdown organize content, support Atx and Setext styles, and improve readability and navigation. Use consistent, descriptive headers and avoid deep nesting. Supports automatic table of contents.

This article introduces the basic syntax for using headings in R Markdown, generating an automatic table of contents, and tips for optimizing headings to help users better organize content and improve readability and professionalism.

In R Markdown, center text using HTML tags <center> </center>, define a CSS class .centered and wrap text with <div class="centered"> </div>, or use fig.align='center' in R code chunks to center plots.