# Opening a type hierarchy in the workbench

You can open a type hierarchy from a button in the workbench toolbar.

1. In the workbench toolbar, click the Open a Type in the Editor button.
2. Select a type in the dialog.
3. Select the Open in Type Hierarchy check box.
4. Click OK.

Java development tools (JDT)

Changing new type hierarchy defaults
Opening a type hierarchy on a Java element
Opening a type hierarchy on the current text selection
Opening a type hierarchy in its own perspective

Views and editors
Type Hierarchy view