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Mouse as a Pointing Device
Left button
The Mouse is a small, lightweight handheld pointing device used to give Right button
input to the computer in a GUI environment. It is moved on a steady and Scroll wheel
flat surface, to move the corresponding pointer on the screen. The cursor’s
motion is proportional to the relative change in position of the mouse.
With the help of a left mouse button you can select and move text, icons,
files, and folders on your computer. The right mouse button is used to
perform additional menu-based functions. The main advantage of using a mouse as an input device is that it has a
simple, easy, and efficient way to navigate on the screen without remembering text based commands.
With the help of mouse you can:
• Move the mouse pointer on the screen.
• Select an object either by a single click or a double click to open a document, or execute a program.
• Select or highlight a text or a file, either by single click or a double click.
• Drag means to select and move an icon, file, folder or a picture from one place to another on the screen. In order to
drag, put the mouse pointer on the desired icon on the screen, then press the mouse button, and without releasing
the button, move the pointer to the destination point and release the button.
• Scroll up or scroll down a document by clicking or by using a mouse wheel.
Types of Mouse
There are three types of mouse which are discussed below:
1. Mechanical Mouse (Ball Mouse): It contains a metallic or a rubber ball on the
bottom. When the mouse moves, the ball underneath also moves along with it.
Then the sensors inside identify the motion and move the corresponding cursor on
the screen. These days mechanical mouses have been replaced with optical mouses.
2. Optical Mouse: The mouse ball is replaced by a small optical sensor on the bottom side to
detect the movement by sensing changes in reflected light. This detected light translates
the movement into cursor movement on the screen. The main advantage of using the
optical mouse is that, it is less sensitive to dust, and the movement is more accurate.
Data Entry and Keyboarding Skills 209

