Tree view
（重定向自Treeview）
- "Treeview" redirects here. There is also a phylogenetic tree visualization software named TreeView.
A tree view or an outline view is a graphical control element that presents a hierarchical view of information. Each item (often called a branch or a node) can have a number of subitems. This is often visualized by indentation in a list.
An item can be expanded to reveal subitems, if any exist, and collapsed to hide subitems.