# Excel Outline Group

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## Content

Following are the breaking changes for Excel Outline Group.

| **API** | **Description** |
| --- | ----------- |
| **Behavior of default range group model's Expands function changed** | Spread for WinForms 11 no longer returns PartCollapsed state of group model. Instead, it collapses the complete group when collapsing a few rows of the group. <br>Spread for WinForms 10 did not support expanding or collapsing of a group at it’s summary cell index. Now, this behavior is supported and hence the compatibility with Excel is sustained. |
| **SheetView.ExpandRangeGroup** | In Spread for WinForms 10, the first level group was expanded when 0 was passed as the parameter value. In Spread for WinForms 11, this is handled by throwing an exception with message: the input group does not exist. |