AbstractButton Properties 
activateAccessKey
Activation of access keys.
Both users and administrators can personalize this property.
hotkey
Activation of hotkeys.
This property can be personalized by an administrator.
text
Label text that is displayed as the explanatory text within the button.
This property can be personalized by an administrator.
explanation
Help text that is displayed when help mode is activated.
More information: Explanation Property
This property can be personalized by an administrator.
Note
The explanation iproperty is only displayed if a Label exists for the corresponding UI element.
Note the following exception:
The explanation property of an AbstractTableColumn is always displayed. If the UI element appears in a Table, and therefore has no Label, then use a AbstractTableColumn.explanation as a replacement for an explanation for the respective UI element (for example, InputField).