Thank you very much for answering. In my use case I actually don’t need the button to be a part of a group, I only use “group of one” to make it work like a Toggle, just like You stated in your answer. I use it for some output filtering – clicking the button turns filtering on/off and by checking items in the dropdown, the user selects what he wants to see. Is there any way to make it work like that? In original Delphi TToolBar this was working correctly, however I was having some high DPI and layout issues so I tried TRzToolbar.