# Design time

This article demonstrates how to populate **RadDomainUpDown** with data at design time. The *RadListDataItem Collection Editor* allows you to do that. You can access it through the *Smart tag >> Edit Items* option:

> caption Figure 1: RadListDataItem Collection Editor

![WinForms RadDomainUpDown RadListDataItem Collection Editor](https://www.telerik.com/products/winforms/documentation/assets/4a457e9ab14e96f2867b10d378422dbb/domainupdown-populating-with-data-design-time001.png)

Another possibility to open the editor is via the **Items** collection in the *Properties* Visual Studio section:

> caption Figure 2:  Visual Studio Properties Window

![WinForms RadDomainUpDown Visual Studio Properties Window](https://www.telerik.com/products/winforms/documentation/assets/86f324a4570d399fcbea6c7213ba382d/domainupdown-populating-with-data-design-time002.png)

Both ways you can add a **RadListDataItem**  which represents a logical data item which can display specific text and image.

## See Also

* [Adding Items Programmatically](https://www.telerik.com/products/winforms/documentation/controls/editors/domainupdown/populating-with-data/adding-items-programmatically)
* [Data Binding](https://www.telerik.com/products/winforms/documentation/controls/editors/domainupdown/populating-with-data/data-binding)
* [Design Time](https://www.telerik.com/products/winforms/documentation/controls/editors/domainupdown/design-time)
* [Getting Started](https://www.telerik.com/products/winforms/documentation/controls/editors/domainupdown/getting-started)
* [Structure](https://www.telerik.com/products/winforms/documentation/controls/editors/domainupdown/structure)