
HTML h1 to h6 tag - W3Schools
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HTML Headings - W3Schools
<h1> headings should be used for main headings, followed by <h2> headings, then the less important <h3>, and so on. Note: Use HTML headings for headings only. Don't use headings to make text BIG or bold .
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HTML Tutorial - W3Schools
At W3Schools you will find complete references about HTML elements, attributes, events, color names, entities, character-sets, URL encoding, language codes, HTTP messages, browser support, and more: HTML Elements
CSS Fonts - W3Schools
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HTML <center> Tag - W3Schools
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HTML Styles - W3Schools
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HTML Computer Code Elements - W3Schools
HTML <code> For Computer Code. The HTML <code> element is used to define a piece of computer code. The content inside is displayed in the browser's default monospace font.
HTML Classes - The Class Attribute - W3Schools
In the following example, the first <h2> element belongs to both the city class and also to the main class, and will get the CSS styles from both of the classes: Example <h2 class="city main">London</h2>
HTML Elements - W3Schools
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