0 to quickly press a button twice on a mouse (= small computer control) to make something happen on a computer screen -- делать двойной щелчок мышью
You can define such dynamic breakpoints by a simple mouse double-click, on the left margin of the source editor.
Double-clicking on the desktop hides all non-excluded fences and icons, while another double-click causes them to reappear.
A user can then double-click on the font stack and see the individual font.
