How to remove from a group

[Kaveh Bazargan]

Can't find how to remove a button from a group of buttons. Tried this in
stack script:

on mouseup
      remove the target from group "presentations"
      grab the target
   end if
end mouseup

but says object is not in group. Checked it is.

-- 
Kaveh Bazargan
Director
River Valley Technologies
@kaveh1000
+44 7771 824 111
www.rivervalleytechnologies.com