中文(香港)â¬: 鍵盤上的Ctrl鍵、Shift鍵及Fn鍵 (Photo credit: Wikipedia ) The keys Control-Alt-Delete highlighted on a QWERTY keyboard. (Photo credit: Wikipedia ) A detail of a computer keyboard showing the AltGr, Windows, Menu and Ctrl keys. (Photo credit: Wikipedia ) The caps lock key on a modern keyboard (near upper-left corner, below the Tab key) (Photo credit: Wikipedia ) Windows system key combinations F1: Help CTRL+ESC: Open Start menu ALT+TAB: Switch between open programs ALT+F4: Quit program SHIFT+DELETE: Delete item permanently Windows Logo+L: Lock the computer (without using CTRL+ALT+DELETE) Back to the top Windows program key combinations CTRL+C: Copy CTRL+X: Cut CTRL+V: Paste CTRL+Z: Undo CTRL+B: Bold CTRL+U: Underline CTRL+I: Italic Back to the top Mouse click/keyboard modifier combinations for shell objects SHIFT+right click: Displays a shortcut menu containing alternative commands SHIFT+double click: Runs the alternate default c...