It is recommended that the use of, relative font sizes when styling a widget's HTML output. Relative font sizes, specified as a percentage of the web browser's base font size, allow the user to change the base font size in their browser to effectively magnify all of the text on the page. Some modern web browser can scale up the text even if fixed font sizes are specified, but some browsers do not change fixed font sizes properly when scaling the page, or will only scale the text along with all other non-text content, which may not be the user's preference.