Whether writing letters or inputting digital data, the keyboard is the main way to input information to the computer. But did you know that you can also use the keyboard to control the computer? Just knowing some simple keyboard commands (computer instructions) can help improve work efficiency. This paper includes the basic knowledge of keyboard operation and the introduction of keyboard commands.
Organization of bonds
The keys on the keyboard can be divided into several groups according to their functions:
Type the (alphanumeric) key. These keys include the same letters, numbers, punctuation marks and symbol keys as those on traditional typewriters.
Control key. These keys can be used alone or in combination with other keys to perform certain operations. The most commonly used control keys are Ctrl, Alt, Windows logo key and Esc.
Function keys. Function keys are used to perform specific tasks. The function keys are marked as F 1, F2, F3, etc. Until F 12. The functions of these keys vary from program to program.
Navigation keys. These keys are used to move and edit text in documents or web pages. These keys include arrow keys, Home, End, Page Up, Page Down, Delete and Insert.
Numeric keyboard. The numeric keyboard is convenient for fast number input. These keys are put in a box and placed in groups, and some of them are like traditional calculators or adders.
The following figure shows how these keys are arranged on a typical keyboard. Your keyboard layout may be different.
The arrangement of keys on the keyboard
Type text
Whenever you need to enter a program, email or text box, you will see a blinking vertical bar (). This is the cursor, also known as the insertion point. It shows where you will start typing text. You can click the desired location with the mouse, or use the navigation keys (see the section "Using Navigation Keys" in this article) to move the cursor.
In addition to letters, numbers, punctuation marks and symbols, typing keys include Shift, Caps Lock, Tab, Enter, space bar and Backspace.
key name
how to use
change
Press Shift and a letter at the same time, and enter the capital letter of the letter. Pressing Shift and another key at the same time will type the symbol displayed at the top of the key.
caps lock
Press the Caps Lock key once, and all letters will be entered in uppercase. Pressing Caps Lock again will turn off the function. The keyboard may have an indicator indicating whether Caps Lock is turned on or not.
label
Pressing the Tab key will move the cursor forward a few squares. You can also press the Tab key to move to the next text box on the form.
enter
Press Enter to move the cursor to the beginning of the next line. In the dialog box, pressing Enter will select the highlighted button.
Space bar
Press the space bar to move the cursor forward one space.
backspace
Pressing the backspace key will delete the characters in front of the cursor or the selected text.
Use keyboard shortcuts
Keyboard shortcuts are ways to use the keyboard to perform operations. Because it helps to speed up work, it is called a shortcut. In fact, almost all operations or commands that can be executed with the mouse can be executed faster with one or more keys on the keyboard.
In the Help topic, a plus sign (+) between two or more keys indicates that they should be pressed together. For example, Ctrl+A means holding down Ctrl and then pressing A A..Ctrl+Shift+A+A means holding down Ctrl and Shift and then pressing A.
Find program shortcuts
You can use the keyboard to perform operations in most programs. To see which commands have keyboard shortcuts, open the menu. Shortcuts (if any) are displayed next to menu items.
Keyboard shortcuts appear next to menu items.
Select menus, commands and options.
You can use the keyboard to open menus and select commands and other options. When you press Alt in a program with menus, and there is an underlined letter in each menu name, pressing the underlined letter will open the corresponding menu. Pressing the underlined letter in the menu item will select this command.
Press Alt+F to open the file menu, and then press p to select the print command.
This technique also applies to dialog boxes. As long as you see an underlined letter attached to an option in the dialog box, you can press Alt and the letter at the same time to select the option.
Useful shortcuts
The following table lists some of the most useful keyboard shortcuts. For a more detailed list, see keyboard shortcuts.
key name
function
WindowsWindows logo key
Open the start menu.
Alt+Tab
Switch between open programs or windows.
Alt+F4
Close the active project or exit the active program.
Ctrl+S
Save the current file or document (valid in most programs)
Ctrl+C
Copy the selected item.
Ctrl+X
Cut the selected item.
Ctrl+V
Paste the selected item.
Ctrl+Z
Undo operation
Ctrl+A
Select all items in the document or window.
F 1
Displays help for a program or window.
Windows logo key +F 1
Display Windows help and support
ESC
Cancel the current task
Application key
Opens a menu of commands related to the selection in the program. Equivalent to right-clicking the selected item.
Use navigation keys
Use the navigation keys to move the cursor, move in documents and web pages, and edit text. The following table lists some common functions of these keys.
key name
function
Left key, right key, up key or down key
Move the cursor or selection one space or one line in the arrow direction, or scroll the webpage in the arrow direction.
home page
Move the cursor to the beginning of a line or the top of a web page.
end
Move the cursor to the end of the line or the bottom of the page.
Ctrl+Home
Move to the top of the document
Ctrl+End
Move to the bottom of the document
Page up
Move the cursor or page up one screen.
next page
Move the cursor or page down one screen.
delete
Delete the characters after the cursor or the selected text; In Windows, delete the selected item and move it to the Recycle Bin.
insert
Turn insert mode off or on. When insert mode is on, insert the typed text at the cursor. When insert mode is turned off, typed text will replace existing characters.
Use the numeric keypad
The numeric keypad arranges the numbers 0 to 9, the arithmetic operators "+"(addition), "-"(subtraction), "*" (multiplication) and "/"(division), and the decimal point displayed on the calculator or adder. Of course, these characters will be repeated in other parts of the keyboard, but the arrangement of the numeric keyboard enables you to quickly enter numeric data or mathematical operators with one hand.
numeric keyboard
To enter numbers using the numeric keypad, press Num Lock. Most keyboards have an indicator indicating whether Num Lock is on or off. When Num Lock is turned off, the numeric keypad will be used as the second set of navigation keys (these functions are printed next to the numbers or symbols above the keys).
You can use the calculator to do simple calculations through the numeric keypad.
Use the numeric keypad to operate the calculator
Click to open the calculator.
Check the keyboard light to see if Num Lock is on. If not, press Num Lock.
Using the numeric keypad, type the first number of the calculation.
On the numeric keypad, type "+","-","*" or "/"to add, subtract, multiply or divide respectively.
Type the next number to calculate.
Press Enter to end the calculation.
Three special keys
At present, almost all possible keys have been discussed. But in order to really understand thoroughly, we will introduce the three most special keys on the keyboard: print screen, scroll lock and pause/interrupt.
Print screen (or print Scn)
A long time ago, this key was actually used to send the text of the current screen to the printer. Now, pressing Print Screen will capture an image of the whole screen ("screen snapshot") and copy it to the clipboard in the computer memory. You can paste (Ctrl+V) from the clipboard into Microsoft Drawing or other programs, and print through the program (if necessary).
The key that is more difficult to attract attention is SysRq, which shares a key with Print Screen *** on some keyboards. Previously, SysRq was designed as "system request", but this command was not enabled in Windows.
point out
Pressing Alt+Print Screen will capture only the image of the active window, not the whole screen.
Scroll lock (or Scr Lk)
Pressing the scroll lock does not work in most programs. In a few programs, pressing Scroll Lock will change the behavior of arrow keys, Page Up and Page Down keys; Pressing these keys will scroll the document without changing the cursor or the selected position. The keyboard may have an indicator indicating whether Caps Lock is turned on or not.
Pause/interrupt
This key is generally not used. In some old programs, pressing this key will pause the program, or press the Ctrl key at the same time to stop the program from running.
Other keys
Some modern keyboards have "hot keys" or buttons that can quickly access programs, files or commands with one click. Other models include volume control, scroll wheel, zoom wheel and other gadgets. For more information about these features, please check the information that came with your keyboard or computer, or visit the manufacturer's website.
Tips for safe use of keyboard
Proper use of keyboard can help to avoid discomfort and injury of wrist, hand and arm, especially when using computer for a long time. Here are some tips to help avoid these problems:
Align the keyboard with the elbow. The upper arm should be relaxed on the side.
Put the keyboard in the middle position in front of you. If the keyboard has a numeric keypad, you can use the space bar as the center point.
Hands and wrists are suspended above the keyboard to hit the keys, so that you can reach the distant keys with your whole arm instead of spreading your fingers.
Don't put your palm or wrist on any surface when typing. If the keyboard has a hand pillow, please use it only when you stop typing.
Tap the keys gently to keep your wrist straight.
When you are not typing, relax your arms and hands.
Use the computer 15 to have a rest after 20 minutes.