Unit 8. Operating system

Topic A: Basic pointing actions

Pointing

Point and click

  • – a device used to control the movement of the pointer (cursor) on the screen.
  • The major pointing devices in use today are the mouse, trackpad or touchpad (laptop), touch screens, etc.
  • – point an object on the screen and then press a button on the mouse to select objects / commands, open menus / hyperlinks (links), or close windows.
  • – quickly click the left mouse button twice on any folder, file, or program to open it.

Left and right click

  • – press the left mouse button on the left side of the mouse. Left-click is often referred to as “regular-click” and it is used for many common computer tasks, such as selecting objects, closing windows, opening hyperlinks, double-clicking, etc.
  • – press the right mouse button on the right side of the mouse to display a popup menu showing commands for a selected item.

Scrolling

Scroll bar

  • – sliding content (text, images, etc.) vertically or horizontally on a computer screen and allowing the user to view different parts of information in a window.
  • – a vertical bar on the right side of a window or screen that allows the user to scroll the window viewing area up or down.
  • – a horizontal bar on the bottom of a window or screen that allows the user to scroll the window viewing area to the left or right.

Scrolling

  •  – sliding content up or down on a computer screen using a vertical scroll bar.
  • – sliding content left or right on a computer screen using a horizontal scroll bar.

– press and hold the left mouse button to grab an object (such as an icon on the desktop) and place it to a different location.

Laptop Touchpad

– an input device for laptop computers that is made up of a flat, touch-sensitive surface. It provides a way to move the cursor around the screen or give an instruction (highlight text, select and open applications, etc.).

Use a laptop touchpad (or trackpad)

  • Tap (click) – point an object on the screen and then tap on the trackpad to select items / commands, open menus / hyperlinks (links), or close windows.

  • Double tap (double click) – double tap on the trackpad on any folder, file, program, word, etc. to open / select it.
  • Drag and drop – double-tap the trackpad to grab an object and place it to a different location. Example: drag the selected text to the new location.
  • Right-click – tap two fingers anywhere on the trackpad to display a popup menu showing commands for a selected item.
  • Scrolling – tap two fingers on the trackpad and slide fingers up or down to scroll.
  • Select – swipe in from the left or right of the sentence or word (tap the right or left of the sentence or word and swipe towards the other side).

License

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Key Concepts of Computer Studies by Meizhong Wang is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.

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