The visibility for multiple objects can be turned on or off in the Object Manager at the same time using the Toggle Visibility command. This command will invert the visibility of any selected objects. For example, if the object was invisible, it will become visible, or vice versa. 

Please see the instructions below to use Toggle Visibility: 

1. Press and hold CTRL on your keyboard.
2. Click the objects you'd like to change the visibility of (all objects can be selected by pressing CTRL+A). Once all objects-of-interest are selected, release CTRL.
   
3. Right click over one of the selected objects and click Toggle Visibility.
   
   

Any object that was visible will become invisible; any object that was invisible will become visible. 

Updated February 28, 2019