How to hide objects that are not selected 

Use

You can hide all objects you have not selected.

Procedure

...

       1.      Select the objects you do not want to hide.

       2.      Click on Show/Hide/Hide all objects except for the selected ones.

Result

Navigation mode is run and the Navigation Mode dialog box is displayed. The corresponding objects and their connections are hidden.

If you have run navigation mode, you can show and hide objects using the Navigation mode dialog box.