The MathML <munderover> element is used to attach accents or limits both under and over an expression.
 It uses the following syntax: <munderover> base underscript overscript </munderover>
Attributes
- accent
- If true, the overscript is an accent, which is drawn closer to the base expression.
 Iffalse(default value), the overscript is a limit over the base expression.
- accentunder
- If true, the underscript is an accent, which is drawn closer to the base expression.
 Iffalse(default value), the underscript is a limit under the base expression.
- align
- The alignment of both underscript and overscript. Possible values are: left,center, andright.
- class, id, style
- Provided for use with stylesheets.
- href
- Used to set a hyperlink to a specified URI.
- mathbackground
- The background color. You can use #rgb,#rrggbband HTML color names.
- mathcolor
- The text color. You can use #rgb,#rrggbband HTML color names.
Examples
Sample rendering: 
Rendering in your browser:
<math displaystyle="true"> 
  <munderover >
    <mo> ∫ <!--INTEGRAL--> </mo>
    <mn> 0 </mn>
    <mi> ∞ <!--INFINITY--> </mi>
  </munderover>
</math>
Specifications
| Specification | Status | Comment | 
|---|---|---|
| MathML 3.0 The definition of 'munderover' in that specification. | Recommendation | Current specification | 
| MathML 2.0 The definition of 'munderover' in that specification. | Recommendation | Initial specification | 
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari | 
|---|---|---|---|---|---|
| Basic support | Not supported | 1.0 (1.7 or earlier) | Not supported | Not supported | 5.1 | 
| accent | Not supported | 1.0 (1.7 or earlier) | Not supported | Not supported | Not supported | 
| accentunder | Not supported | 1.0 (1.7 or earlier) | Not supported | Not supported | Not supported | 
| align | Not supported | 12.0 (12.0) | Not supported | Not supported | Not supported | 
| href | Not supported | 7.0 (7.0) | Not supported | Not supported | Not supported | 
| mathbackground | Not supported | 4.0 (2.0) | Not supported | Not supported | 5.1 | 
| mathcolor | Not supported | 4.0 (2.0) | Not supported | Not supported | 5.1 | 
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | 
|---|---|---|---|---|---|---|
| Basic support | Not supported | Not supported | 1.0 (1.0) | Not supported | Not supported | Not supported | 
| accent | Not supported | Not supported | 1.0 (1.0) | Not supported | Not supported | Not supported | 
| accentunder | Not supported | Not supported | 1.0 (1.0) | Not supported | Not supported | Not supported | 
| align | Not supported | Not supported | 12.0 (12.0) | Not supported | Not supported | Not supported | 
| href | Not supported | Not supported | 7.0 (7.0) | Not supported | Not supported | Not supported | 
| mathbackground | Not supported | Not supported | 4.0 (2.0) | Not supported | Not supported | Not supported | 
| mathcolor | Not supported | Not supported | 4.0 (2.0) | Not supported | Not supported | Not supported |