You can show and hide model content.
Procedure
Leave the model items unselected, or select the relevant model items.
Activate the View tab bar.
Click Hide/Show. The menu items contained in the pop-up menu differ depending on your selection:
Hide objects (opens the Hide objects dialog where you can select the objects to be hidden)
Hide selected objects (hides the selected objects)
Hide to a depth of (opens the Enter hiding depth dialog where you can enter the level to which objects are to be hidden)
Hide all objects except for the selected ones (hides objects that are not selected)
Hide all objects of this type (hides all objects that are of the same type as the selected objects)
The Navigation mode dialog is shown. The corresponding objects and their connections are hidden. You can show the hidden content again.