Is there a gesture to dismiss a notification It happens with unusual frequency that a notification will pop up covering the top right area of my window, right when I need to get a something in that top right area.  I'd rather not have to wait the 5 seconds for the notification to go away. Is there a way to dismiss the notification right away?

I had read here that a right swipe on the magic mouse would do the trick, but that doesn't seem to be the case, at least for me.
in el Capitan, the swipe away feature was disabled for Reminder alerts. Now you have to click Later.. then click 1 hour, 1 day, etc.. So they changed a simple swipe away gesture with 2 clicks.. per notification. It makes it way more complicated, I don't know what Apple was thinking when they changed this, at least they should give the option of making it simpler.