In order to isolate selected items in graphical view we should select the room in the Spatial Containment tree and then you need to go to upper left side of the screen to select isolate option. And the if you would like to remove isolation, again you should search for this option in upper left side of the screen.
Actually this should be in the Spatial containment tree menu - option, which can isolate selected items and option to enable zoom-in. Such options will allow user to easily look at selected items in graphical view.