| Syntax | <alphavalue> | initial | inherit |
| Initial value | 1 |
| Applies to | all elements |
| Inheritance | false |
| Type of computed value | UINT |
| Functions |
element::setOpacity() element::getOpacityStr() element::getOpacity() |
| <alphavalue> | A value within the interval [0.0,1.0]. |
| initial | Keyword. Sets the property to its initial value. |
| inherit | Keyword. Inherits the value from the parent element. |