Alspa

I am relatively new to C++ builder (Rad Studio 12.3). I am trying to develop a kiosk app in which a web page is displayed full screen, no menus or address bars or toolbars. I would like to place a transparent home button on top of the browser window but can't seem to get the control transparent. The only controls that can even be displayed on top of the TEdgeBrowser control is the TButton or TStaticText control. All others can't be brought up to sit on top of the TEdgeBrowser control. Any help would be immensely appreciated.