How to copy an object? How to import objects from another document?
You can copy an object either by dragging it from one document to another, from one document view to another, or by using cut/copy/paste commands from the Edit menu. You can control the extent of the copy operation using ‘Deep Copy’ check in the ‘Options’ menu. If checked, deep copy is enabled. This means that when an object is copied all objects referenced by that object are also copied. This rule applies to all referenced objects recursively. Therefore all objects referenced directly or indirectly will be copied. If deep copy is not checked, shallow copy will be performed. This means that only direct sub-objects will be copied, whereas indirect references will be replaced with Null objects.
