Page 174 - Trackpad IT-402_Class-IX
P. 174

Subject: To improve your typing speed

                       Step 1:   Place the four fingers of both of your hands on the Home Keys - ASDF and JKL.
                       Step 2:   Use the index finger of the left and the right hand to use the two keys ‘G’ and ‘H’
                       Step 3:   Type the following text:
                               ASDFG;LKJH
                       Step 4:    Switch on the timer and repeat Step 3 on a new line, till you have the same text on the
                               next 20 lines.
                       Step 5:  Check your speed and note it down.
                       Step 6:   Repeat the above exercise after a day and see the difference in your typing speed and
                               typing confidence.






                POINTING DEVICES
        Pointing devices are input devices that allow the user to interact with the computer by controlling the pointer on the
        screen. You click using the device to select an object, and drag it to another place. A pointing device is important for a
        Graphical User Interface (GUI) environment like the Windows, Mac OS, etc. Some of the examples of pointing devices
        are Mouse, Joystick, Stylus, Light pen, Touch screen, etc. The most important pointing device are perhaps, the mouse,
        for the desktop computer and the touchpad, for the laptop.

        Mouse as a Pointing Device

        The Mouse is a small, lightweight handheld pointing device used to give input to the computer in a GUI environment.
        It is moved on a steady and 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 together 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.



          174   Trackpad Information Technology-IX
   169   170   171   172   173   174   175   176   177   178   179