The DevExpress ASP.NET Tree List (ASPxTreeList) provides a preview feature that allows each node to display a preview.
Preview areas allow large memo fields or custom data to be displayed across all columns within the ASPxTreeList.
To enable the Preview feature, set the Settings.ShowPreview property to true.
You can specify the required data source field via the PreviewFieldName property, to bind node previews to data.
Use the Styles.Preview property to access the style settings used to paint previews.
To provide a template for rendering previews, use the Templates.Preview property.