How to display names of objects in viewport Is there anyway to display the names of objects in a scene, all at once like the option we have for bones? Yes,we can do it individually..but if there are many objects its better to have have common control
I am working with a mechanical assembly,its very difficult to keep track of objects. 
Any hidden option or  add-on information would be helpful. 

Thanks.
Select all objects by hiting A. Then in the
Properties areas Object tabs Display
group check the checkbox Name for name display.
Then right click the checkbox and select the option
Copy To Selected. Works on almost all options.

Edit: In current versions, using alt-click on
properties applies them for every selected object.