Sorry for the late reply.
Unfortunately, there are some serialization problems with the UI element editor that we are still to research. For now you can easily access the ActionButtonElement as follows:
|ClassSelector selector = new ClassSelector("OfficeButton"); |
|RadElement actionButtonElement = selector.GetSelectedElemen(this.radRibbonBar1.RibbonBarElement); |
|actionButtonElement.Padding = new Padding(0); |
the Telerik team