In order to keep track of your objects, especially while using
the object manager, its best to give them some recognisable names.
Its not very good to have ten cubes, all with the name 'cube', you're
going to get lost pretty quickly.

To give an object a name:

You can change the object's name before it is created. When you
select a primitive from the menu, make sure you hold down the 
shift key while you select the menu item. In the 'name' field,
delete what is already there and type in a new name for the object.

If you want to change the name of an object after it is created, bring
up the object manager (press V) and select the object you want to
change. At the bottom of the window that you've selected the object in,
there is a text field where you can change the name of this object.

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