Create Overlap Region And Chat box Button

 

Overlap Region

1. Create a region and then region properties>> Appearance>> CSS Class>>  a-DevToolbar a-DevToolbar a-DevToolbar--right

Chat Box Button
1. Create a button and fixed a id in static ID Then Copy pest the below CSS into Style


#id{
  z-index:100;
  position:fixed;
  width:60px;
  height:60px;
  bottom:40px;
  right:40px;
  background-color: rgba(55, 76, 139, 0.81);
  color:#FFF;
  border-radius:50px;
  text-align:center;
  box-shadow: 2px 2px 3px #999;
}
.my-id{
  margin-top:22px;
}