Not sure if this belongs in Wishful features?

Is it possible to change the speed of the keys on a key layer? i.e. after having 'Sampled' a couple of selected key layers, can I select those keys and stretch them out while leaving the other animation data unaffected?

It's a pretty common feature in most of the other animation tools I've used so surprised I can't find how to do it. 

ps. I have the Curves Editor, but couldn't see how to do it in there either

                                    

Unity Virtual Reality Developer