example:
when several object groups are grouped within another group, how can I get the group out of there without ungrouping everything, or selecting all geometry one by one?
I would love to have a command: “remove group from group”
does something like that exist?
thnx,
Daniel
Hi Daniel,
Use RemoveFromGroup and then within the command use Select by group name,
(’_SelGroup)
choose group to remove, OK completes command
thanks Fred, that actually works, but not in my case as I don’t work with group names… I would need to select it via the viewport.
hmmm- That seems like a hard one to solve since objects can be members of any number of groups.I don’t know how to get there cleanly without using names.
-Pascal
Select
Ungroup (shift-ctrl-g)
Ctrl-unselect the group you want out
Group (ctrl-g)
Done in 1sec.
I do it all the time 
yes, Holo that works but not if you have groups in groups in groups.
so if I have to ungroup+ungroup to get to ctrl+deselect the goup I want to extract, then the grouping of other groups is lost.
oh boy… a lot of grouping going on there, but after all it makes sense I hope…
so what Iwould like to have is basically a selection list of groups within which a piece of geometry is contained and then extract the respective parts by choosing a group
Well then I would isolate first.
Select inverse hide
and use layers more 
Hi Daniel,
If you don’t Name or Label your groups, how do you know what’s in a group and what groups are in a ‘group of groups’?
Sounds like you might benefit from setting up a ‘naming scheme’.
Use SetGroupName and within that Command, '_SelGroup.
List to choose from:
Select and name something meaningful…
Hi Daniel,
I have been using a script I wrote just to handle cases like you have described (to extract a group from a hierarchy of groups). It is a bit tricky as Pascal said since Rhino allows for groups cross-referencing objects. So you need to be a bit careful with that.
The script is smart enough that if you try to externalize a group that has sub-groups, it will keep them intact, unless some of the objects are cross-referenced into any groups with objects not belonging to the group you are externalizing (are you still following? 
)
Here is the tool, save on HD, drag-and-drop into Rhino; the command is: Externalize_Group
Externalize_Group.rvb (2.4 KB)
hth,
Jarek
perfect
cross referencing not an issue in my files… I use this grouping as a quick on the fly, while drafting replacement for blocks. A pure graphical way of quickly organizing a file. And in this course I sometimes encountered the urgent need of doing exactly what your script can do.
I was pretty sure someone else was bugged by this, too.
thanks for sharing!
great, I’m glad it helps!
I try not to rely on nested groups too much due to lack of clarity in viewing the hierarchy, but definitely sometimes grabbing a nested group from more complex grouping is a big time saver…Also some imported files like SKP create bunch of nested groups on import, so that’s another case when I use it.
–jarek
in Rhino v2 there was a plugin that would list group names and I believe hierarchies as well in a layer-type always on window. would be happy to see that resurrect 
yeah, it was called Object Viewer, wish it was resurrected as well.
Hey Jarek,
Thanks so much for posting that tool, it is just the thing I have been looking for, you have made my day!!
All the best.
Geoff.
Where did you find Object Viewer?
object viewer was a rhino V1.5/2 plugin from the erarly 2000’s 
