| Attribute | Required | Values | Default Value | Explanation |
|---|---|---|---|---|
| caption (aka: label) | No | Any text | n/a | The caption attribute is used to specify the text content of the label. |
| scale | No | Any positive number | 1.0 | Factor by which to scale the text in the label from the default size specified by Android. |
| centered | No | true, false | false | Whether or not the text should be centred within the label. |