I use TAxisClickTool with Laz 2.1. When I set its shift state to "ssLeft" or "ssRight", everything is fine - the user clicks on the axis and the OnClick event is triggered.
When I now change the shift state to "ssDouble", it doesn't work. Since the tool has no "OnDoubleClick" event I don't know how to achieve that when double-clicking on the axis title, the "OnClick" event is triggered.