The RichText widget in the Qt UI currently supports the tags listed below. Note that not all of them will make sense for use within YaST2 (Most notably all those which refer to files)
<qt>...</qt> - A Qt rich text document. It understands the following attributes
title - the caption of the document. This attribute is easily accessible with QTextView::documentTitle()
type - The type of the document. The default type is page . It indicates that the document is displayed in a page of its own. Another style is detail. It can be used to explain certain expressions more detailed in a few sentences. The QTextBrowser will then keep the current page and display the new document in a small popup similar to QWhatsThis. Note that links will not work in documents with <qt type="detail" >...</qt>
bgcolor - The background color, for example bgcolor="yellow" or bgcolor="#0000FF"
background - The background pixmap, for example background="granit.xpm". The pixmap name will be resolved by a QMimeSourceFactory().
text - The default text color, for example text="red"
link - The link color, for example link="green"
<a>...</a> - An anchor or link. The reference target is defined in the href attribute of the tag as in \c<a href="target.qml">...</a>. You can also specify an additional anchor within the specified target document, for example <a href="target.qml#123">...</a>. If a is meant to be an anchor, the reference source is given in the name attribute.
<font>...</font> - Customizes the font size and text color. The tag understands two attributes:
color - the text color, for example color="red" or color="#FF0000".
size - the logical size of the font. Logical sizes 1 to 7 are supported. The value may either be absolute, for example size=3, or relative. In the latter case, the sizes are simply added.
<em>...</em> - Emphasized. As default, this is the same as <i>...</i> (Italic)
<strong>...</strong> - Strong. As default, this is the same as <bold>...</bold> (bold)
<big>...</big> - A larger font size.
<small>...</small> - A smaller font size.
<code>...</code> - Indicates Code. As default, this is the same as <tt>...</tt> (typewriter)
<pre>...</pre> - For larger junks of code. Whitespaces in the contents are preserved.
<large>...</large> - Large font size.
<b>...</b> - Bold font style.
<h1>...</h1> - A top-level heading.
<h2>...</h2> - A sub-level heading.
<h3>...</h3> - A sub-sub-level heading.
<p>...</p> - A paragraph.
<center>...</center> - A centered paragraph.
<blockquote>...</blockquote> - An indented paragraph, useful for quotes.
<multicol cols=n >...</multicol> - Multicol display with n columns
<twocolumn>...</twocolumn> - Two-column display.
<ul>...</ul> - An un-ordered list. You can also pass a type argument to define the bullet style. The default is type=disc, other types are circle and square.
<ol>...</ol> - An ordered list. You can also pass a type argument to define the enumeration label style. The default is type="1", other types are "a" and "A".
<li>...</li> - A list item.
<img> - An image. The image name for the mime source factory is given in the source attribute, for example <img source="qt.xpm"/> The image tag also understands the attributes width and height that determine the size of the image. If the pixmap does not fit to the specified size, it will be scaled automatically.
<br> - A line break
<hr> - A horizonal line