Navigate Model Hierarchies
Subsystems and model references allow you to create a hierarchical model comprising many layers. You can navigate this hierarchy using the Model Browser or with Simulink® Editor model navigation commands.
Open a Subsystem or Referenced Model
To open a model component using the Simulink Editor context menu:
In the Simulink Editor, right-click the Subsystem block, Model block, or canvas.
From the context menu, select one of these options:
Open — Open the subsystem or referenced model in the same window and tab as used for the top model.
Open In New Tab — Open the subsystem or referenced model in a new tab.
Open In New Window — Open the subsystem or referenced model in a new Simulink Editor window.
Open As Top Model — Open a referenced model as a top model in a new Simulink Editor window.
For any operation to open a subsystem or referenced model, you can use a keyboard shortcut to have it open in a new tab or window:
| Where to Open the Subsystem or Referenced Model | Keyboard Shortcut |
|---|---|
In a new tab | Hold the Ctrl key while opening the subsystem or referenced model. |
In a new window | Hold the Shift key while opening the subsystem or referenced model. |
Tip
To navigate up and out of a subsystem or referenced model, use the
Navigate arrows 
at the top left. The subsystem or referenced model you
navigated from appears highlighted so that you can identify where you came from.