Change the size of text in your Tumblr posts by using HTML tags. You can change the size of the entire post or just certain portions of the post, and you can make the text larger or smaller.

Increasing or decreasing the size of the text in your operating system or Web browser can be tricky, but our easy guide walks you through it.

Text size in HTML documents can be affected by multiple factors including browser default styles, styles added by the HTML document and, if the code allows it, browser settings and user style sheets.

Text size is affected by multiple factors including browser default styles, styles added by the HTML document, browser settings, and sometimes user style sheets.