Thank you for your interest in RadToolTip control.
The implicit style is not working because the properties of the RadToolTip are for per control not for per RadToolTip. That means that setting in style will not work. To change the Placement, HorizontalOffset, VerticalOffset
etc. properties globally you can either set the attached properties to every control in your application or override their default value using OverrideMetadata() method. Check the following code snippet.
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