Provides the ScreenTip text to be used for the button.
xsf:xdTitleThe tooltip attribute is an optional attribute of the button element.
This attribute applies only to buttons used on a toolbar.
The following is an example of the tooltip attribute as it is used in the button element:
<xsf:toolbar caption="CD Collection Toolbar" name="CD Collection Toolbar">
   <xsf:button action="xCollection::insert" xmlToEdit="CD_10" 
      caption="New CD" showIf="always"
      tooltip="Insert a CD.">
   </xsf:button>
   ...
</xsf:toolbar>