Gets or sets whether the group is marked with a special flag (has a special accent) that makes the group painted with different outer indents. This is a dependency property.
A Nullable Boolean type that specifies whether the group is marked with a special flag that affects its painting.
If the HasAccent property is set to Null or False, the group's outer indents are equal to the outer indents of regular LayoutControlItems. So the group is not conspicuous from among sibling layout items. If the HasAccent property is set to True, the group's outer indents are increased, so the group becomes more conspicuous.
In the following image, the City, Region and Postal Code items are combined into a borderless group. The HasAccent property is set to Null(by default), so the group is not indented from the sibling items:
If the HasAccent property is set to True, the group gets larger outer indents: