"Great minds think alike ;) http://v5.rhino3d.com/forum/topics/layer-functions-wishlist"

"Hi Chris- I am not sure I follow- a split is no different from a trim as far as the state of the resulting objects goes- the result is the same except that Split does not delete any of the pieces. You can untrim a split surface just like a trimmed…"

"Alternatively, it would be nice if the split line disappeared after I joined two split surfaces..."

"With the current parent/child layers and sublayers it can get quite confusing because objects can belong to both the layer and its sublayer. And I always have to unhide the parent layer even if I just want to see the sublayer. So for a proper…"

"Yes I agree. In general the layer management in Photoshop is very good and something the development team could take as inspiration."

"Yes I agree with this request and have the same problem. Shifting toolbars (even when locked) are a constant nuisance for me. "