Anyone who has worked with me knows how much I enjoy working with mainly the keyboard alone. IntelliJ and Eclipse have great ways of doing things with the mouse, and as I’m finding out, Visual Studio has a plethora of them as well. Unfortunately many of them trigger hidden buttons or menu items that don’t exist. We accidentally turned on a “feature” of showing spaces as dots and took a while searching out how to turn if off as shown in the diagram below.
If it ever happens to you, you apparently have to drag a button onto one of the menu bars in order to disable it. Otherwise try the short cut keys, CTRL-R followed by CTRL-W. Of course…