# Overview

The **RadDataGrid** control has a built-in **Grouping UI** and also provides support for programmatic grouping.

![WinUI Grouping-UI-Dragged Column](https://www.telerik.com/winui/documentation/assets/bd1719db23942bed189949cec94d0a69/grid-grouping.gif)

## Grouping Actions

The Grouping UI supports the following actions:

* **Reorder**—You can reorder the elements in the Grouping UI and thus change the priority of the corresponding group descriptors.
* **Sort**—You can sort the group headers in an ascending or descending order by the group key.
* **Remove**—You can remove groups.

You can also expand and collapse groups by a click/tap on the group header.



> Dragging a column header to the Grouping UI adds a **PropertyGroupDescriptor** to the **GroupDescriptors** collection of the RadDataGrid.

## UserGroupMode

The grouping UI is enabled by design. You can control its visibility through the **UserGroupMode** property.

#### **Example 1: Disable grouping UI**

```XAML
<dataGrid:RadDataGrid UserGroupMode="Disabled" />
```

## GroupPanelPosition

You can also control the position of the grouping UI with the **GroupPanelPosition** property that supports the following options

* **Left**—Displays the grouping UI on the left side of the control. This is the default value for an UWP application.
* **Bottom**—Displays the grouping UI on the bottom side of the control.
* **Top**—Displays the grouping UI on the top side of the control.
* **TopInline**—Displays the grouping UI on the top side of the control with the group items displayed inline. This is the default value for a Windows application.

#### **Example 2: Display grouping UI at the bottom**

```XAML
<dataGrid:RadDataGrid GroupPanelPosition="Bottom" />
```

## GroupHeaderDisplayMode

You can choose whether the group headers will be frozen at the top or are scrollable together with the content through the **GroupHeaderDisplayMode** property.

#### **Example 3: Scroll group headers together with the content**

```XAML
<dataGrid:RadDataGrid GroupHeaderDisplayMode="Scrollable" />
```

## Programmatic Grouping

Programmatic grouping can be done by adding group descriptors to the **GroupDescriptors** collection. There are two types of descriptors:

* **[PropertyGroupDescriptor](https://www.telerik.com/winui/documentation/controls/raddatagrid/grouping/raddagagrid-propertygroupdescriptor)**—Uses a property from the model as a group key.
* **[DelegateGroupDescriptor](https://www.telerik.com/winui/documentation/controls/raddatagrid/grouping/datagrid-delegategroupdescriptor)**—Creates a custom group key.

> Each GroupDescriptor adds a new level of grouping.