I wonder, Cooba, did you ever try pressing stuff like E, Ctrl+E and Shit+E?

Also, I think using B to select a single transparent tile is not quite helpful, because you need to hold down Shift in order to place it. The only reason I would use B on transparent tiles is because using B on a group of transparent tiles with (preferably different types of) events allows you to put those events elsewhere with Shift + click (or Shift + Enter).