Hi Szafran,
This is otherwise known as *Back Annotation*. At present this is not supported in EasyEDA.
*Forward Annotation* from schematic to PCB is supported using the `Import Changes...` button:
![enter image description here][1]
If back annotation is important to you, please raise a Feature Request.
Thanks.
[1]: /editor/20160914/57d93bde5da55.png
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