The label graphic is an optional graphic (see Item.LabelImage). The label graphic areas of all items are always aligned, regardless of item levels, so all label graphics are displayed in one column, without indentation. The label graphic can be of any size and any number of different graphics can be used, one for each item. In a fixed height tree control, all label graphics used must be the same height and width. In a variable height tree control, label graphics can be of varying height and width.