Is this what i think it is? The sharing of talents of that character and their action bars?
I hope it is. I am tryign to get all my druids on the same page when it comes to button placement. Some are different though and it bugs me cos when i switch toons i am looking for the icon and cant find it.
If you’re referring to the checkbox when you edit a loadout it’s to make that loadout use the bars for the spec rather than bars specific to that loadout. By default each loadout has its own set of bars now.
If you’re trying to copy your bars from one character to another use Action Bar Profiles (Fan Update).