Button view and clicking

Notice you can also change the view to Buttons. The difference is this: In Icon view and List view, you double-click to open files. In Button view, you single-click. To drag a button, you must drag the file by its name—you can't drag the button itself. To follow the instructions in this book, don't choose the Button view. Later, if you decide you want to use buttons, go ahead.

This is a button. It's. just another way of looking at a file icon.