I've the beta uninstalled right now but just recalled and tested on 2018.2 and I suspect this still happens in beta, please someone give it a go takes less than a minute. -Create a canvas -Create a gameobject, add vertical group component -Add several buttons. Ok fine, they've hte position locked because they're part of that group, now take one of the buttons and drag it out of the group. They still have the position fields grayed out fields in teh editro, but if you drage them in Scene view they can move and the position values change, if you save and reopen the scene it will be ungrayed. Is small glitch but is a thing that needs to be fixed. Same with horizontal group.