Hold and release

I am sure I am missing something. I have been using Roomie for a few days and love it. However, I keep reading that you can set buttons to “hold and release”. Specifically I have and Apple Tv2 setup up as a device using the original remote. I have an activity set up to turn on the TV, set it to the correct input, and tun on the Apple TV by sending the “menu” command. All this works great. However I would like to set some buttons to “hold and release” on the original remote. Can you please tell be exactly how to do that. I have read the forums and can’t figure it out. I see in the activities startup command the “hold and release” is greyed out which makes sense. You don’t want to hold and release at startup. But is there a way to edit the individual keys when the remote is displayed?