WebParts Controls[11]->LayoutEditorPart

The LayoutEditorPart class is an editor control that derives from the EditorPart class, and is used to edit properties that affect the layout of an associated WebPart or GenericWebPart control.

The most common and convenient way to add a LayoutEditorPart control to a page is by declaring it in page persistence format inside an EditorZone

The LayoutEditorPart control is a tool part that becomes visible only when a Web Parts page is in edit mode, and when a specific WebPart control has been selected for editing.

C# LayoutEditorPart Sample