A mouse button refers to one of the primary control mechanisms on a computer mouse that facilitates interaction with graphical user interfaces and operating systems. It is a physical push-button or switch on the surface of the mouse that can be pressed or released by the user's finger.
A typical computer mouse consists of at least two buttons—a left button and a right button—positioned for operation by the index and middle fingers respectively, although some mice may have additional buttons for enhanced functionality. These buttons are generally mechanically actuated, employing microswitches or similar mechanisms to register their activation. When a button is pressed, an electrical signal is sent to the computer, which then interprets the action based on the program or operating system handling the input.
The left mouse button is the most frequently utilized button and is typically associated with primary functions, while the right mouse button is used for secondary functions and accessing contextual menus. Together, they form the core components of the computer mouse, allowing users to point, click, and select objects on the screen, drag and drop files, navigate through software applications, and perform various other actions.
The term "mouse button" is also used to describe the act of pressing a button on a mouse, and can be used more broadly to refer to any button on a computer mouse, regardless of its actual position or function.
The word "mouse" in the context of a computer device derives from its resemblance to a small rodent. The term was first used to describe a pointing device in the 1960s. The term "button" refers to the physical switch or key that can be pressed or clicked. Thus, the phrase "mouse button" simply combines both terms to describe the switches on a computer mouse that are used for various functions.