computer commonly used small knowledge: Alt key uses twelve strokes, let's take a look! 1. Activate the operation command: press the Alt key to activate the menu bar of the active window, so that the first menu of the menu bar becomes a highlight bar, and pressing the Alt key and a letter can activate the menu item represented by the letter. If you press Alt+F, you can activate the “File” menu of the current window. In addition, in the dialog box, press the Alt key and the underlined letter at the same time to select the option and perform the corresponding operation. 2. Terminate a process: Press Ctrl+Alt+Del to pop up a “Close Program” dialog box, select a process, and then click ““End Task” to quickly terminate the process. Press Ctrl+Alt+Del again to restart your computer. 3. Pop-up drop-down list: In the dialog box, you can use the Alt+Down arrow key to pop up the selected drop-down list, so as not to move the mouse to find and click the arrow button under the list box. 4, quickly view the properties: press the Alt + Enter key combination or hold down the Alt key while the left mouse button double-click an object (such as the folder in the right window of the Explorer, files, icons on the desktop, etc., the file in the left window If you can't clip it, you can quickly open its "Properties" dialog box. Its role is equivalent to clicking the right mouse button and selecting “properties”. 5. Switch DOS window: Press Alt+Enter to switch MS-DOS in window and full screen mode. 6, universal capture hotkey: in the running game or other application software, when the beautiful screen appears on the screen, press the Alt+PrintScreen key combination, you can copy the contents of the current active window or dialog box to the clipboard, and then call &ldquo Brushes & rdquo; or other drawing programs, select the “Paste & rdquo; item in the "Edit" menu to bring up a beautiful picture. 7. Close the app: Press Alt+F4 to close any application in the quickest way, instead of looking in the file menu or toolbar and clicking & ldquo; quit & rdquo; or “ close & rdquo;. 8, switch the application: hold down the Alt key, and then press the Tab key continuously to display the icon of all programs currently running and the icon of the currently activated program and its name in a dialog box, as long as the release of Alt The key can be switched to the application immediately, called "cold switching". 9. Open the Control Menu: In the application, press Alt+Spacebar to open the System Control menu directly. 10. Undo the previous step: In the various dialogs of Windows 98, all operations on the edit box can be undone by the Alt+Backspace key, and the effect is exactly the same as Ctrl+Z. This feature is also applicable to Microsoft's word processing software, such as Notepad, Writer, WORD, etc. In addition, this key combination can also be used to undo file operations such as file movement or renaming. 11, switch accessibility options: For specific users who need to use the auxiliary option shortcuts, the Alt key can also help. For example, press the left Alt+Left Shift+Print Sscreen button to toggle the high contrast switch; press the left Alt + Left Shift + Num Lock button to toggle the mouse button switch. 12. In Word: When selecting text, if you press the Alt key and then drag the mouse, the column selection mode (otherwise, the row selection mode); when dragging the ruler or table line, you cannot see the exact data. , but if you press the Alt key and then drag or click, you can get accurate data.