This is only possible by using the numbering for selected parts. I would use the modelbrowser, here you could easily select the parts by using the shift key and then use the numbering button.
The rule for numbering is a wish for long time...lit's hope for it.
Sebastian Eiche
Application Engineer @Mensch und Maschine acadGraph
![EESignature EESignature](http://autodesk.i.lithium.com/t5/image/serverpage/image-id/1272565i464DC3DC646B4F11/image-size/original)
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