Mouse Over are tooltips, i.e. operating aids or tool aids. They are pop-ups of the graphical user interface (GUI) of operating systems and application programs that open when the user leaves the mouse cursor on a function element for a short time
The pop-up opens with a slight time delay and contains a short description text in a rectangular box with a yellow
background. The pop-updisappears as soon as the mouse cursor is moved further or automatically after a certain time.