Layout Tree View
The Layout Tree View embedded in the Customization Form allows you to do the following.
Access the layout hierarchical structure.
Move layout items across the layout by dragging them within the Layout Tree View.
Customize layout items using the Context Menu.
When the Context Menu is about to be invoked for items in the Layout Tree View, the LayoutControl.LayoutTreeViewPopupMenuShowing event fires, allowing you to modify the menu.