Hi ..
I assume you are using CE2013 ?
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it may be that the tutorial states this feature and we did not remove it in the 2013 version of the tutorials. actually, due to the complete rework of CE 2013 ( to implement the CityEngine SDK ), this feature had to be skipped for time reasons.
we're right now reimplementing it.
sorry for the inconvenience ..
matt
Hmm. now I'm not sure if I understood you correct in the first place.
Can you post a screenshot of where you're missing the function ?
Let me know ..
Matt