Class diagram toolbar, context menu, and legend

Item	Description
	Click this button to show fields in the class nodes.
	Click this button to show constructors in the class nodes.
	Click this button to show methods in the class nodes.
	Click this button to show properties in the class nodes.
	Click this button to show inner classes in the class nodes.
	Click this button to reveal the combo box, and select visibility level of the elements to be displayed in a diagram.
	Click this button to reveal the combo box, and select the desired scope of elements to be displayed in diagram, for example, project or non-project files. The elements out of the selected scope will be hidden.
	Click this button to enable creating extends or implements links between node elements. Click the element and drag the line from it to the other element to connect them. If this button is not pressed, links cannot be drawn.
	Click this button to show dependencies of the selected class or package.
	Click this button to increase the scale of the diagram, or press `NumPad+`.
	Click this button to decrease the scale of the diagram, or press `NumPad-`.
	Click this button to restore the actual size of the diagram.
	Click this button to make the contents fit into the current diagram size.
	Click this button to apply the current layout, selected from the context menu of the diagram, or press `F5`.
	Click this button to save the current diagram as a UML file.
	Click this button to save the diagram in an image file.
	Click this button to print the diagram.

This section describes only those context menu commands that are not available from the toolbar.

Item	Shortcut	Description
Add class to diagram	`Space`	Choose this command to add existing class to the diagram background.
Collapse nodes	`C`	Choose this command to show the containing package of the selected node.
Expand nodes	`E`	Choose this command to show class diagram of the selected package.
New	`Alt+Insert`	Choose this command to create a new node element or member.
Refactor		Point to this node to select one of the refactoring commands available in this context.
Analyze		Point to this node to select one of the code analysis commands available in this context.

Legend of the Class Diagram

IntelliJ IDEA follows the UML conventions in showing relationships between the classes.

Besides that, IntelliJ IDEA supports the following colors and arrows:

Item	Description
	The green arrow corresponds to the `implements` clause in a class declaration.
	The blue arrow corresponds to the `extends` clause in a class declaration.
	This sign appears for the inner classes.