provides shortcut menus that contain frequently used commands appropriate to the currently selected items. You can access a shortcut menu by clicking the right mouse button (RMB) after selecting an item. Shortcut menus are accessible in:

provides different procedures to add custom buttons to popup menus, depending on the buttons’ context. To add to the model tree popup menu, use the procedure described in Adding a Button to the Model Tree Popup Menu. To add a popup menu to a custom dialog box, see the User Interface: Dialogs section (you cannot modify the popup menus in an existing UI dialog box). To add to a graphics window popup menu, refer to Adding a Popup Menu to the Graphics Window.