Visibility

Shift+Ctrl+A – View all [View all objects]

Shift+Ctrl+K – View class [View objects of current class (state of other objects untouched)]

Ctrl+Alt+K – View curr class [View objects of only current class (hiding the rest)]

Shift+Alt+K – View class + kids [View objects of this class and it’s descendants (hiding the rest)]

Alt+H – Hide class [Hide all objects of this class]

Alt+S – Hide selection [Hide currently selected objects (excepting current object)]