Summary  
This chapter explains the use of semantic inline text elements—such as mark for highlights, small for fine print, sup for superscripts, and sub for subscripts—to add meaning and improve accessibility in code.  

General domain of usage  
Web development

Each inline element serves a specific purpose: `<mark>` for highlights,
`<small>` for fine print, `<sup>` and `<sub>` for scientific
notation. Using them appropriately enhances both meaning and accessibility.

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

Which HTML element would you use to display a chemical formula like H₂O?

Learn how to create meaningful, accessible, and visually rich web content using HTML. Combine text, images, audio, and video to craft pages that are structured, engaging, and optimized for search engines. Gain practical skills in semantic markup, media integration, and navigation design to build web pages that look great and perform well.

Build a strong foundation for creating clear and readable web content. Use semantic elements to structure text, emphasize key information, and organize content with lists that enhance both meaning and accessibility.

Enhance web pages with images that are both visually engaging and accessible. Embed and optimize visuals effectively, add descriptive alt text, and use figures with captions to give context and meaning to visual content.

Combine multimedia and navigation elements to create engaging, discoverable, and user-friendly websites. Add audio and video content, build intuitive navigation menus, and include meta information that improves SEO and accessibility.

Other Inline Text Elements