Operate Calculator with the numeric keypad

Operate Calculator with the numeric keypad

To use the numeric keypad to enter numbers, press Num Lock. Most keyboards have a light that indicates whether Num Lock is on or off. When Num Lock is off, the numeric keypad functions as a second set of navigation keys (these functions are printed on the keys next to the numerals or symbols).

You can use your numeric keypad to perform simple calculations with Calculator.

Operate Calculator with the numeric keypad

1.    Click to open Calculator.

2.    Check your keyboard light to see if Num Lock is on. If it isn't, press Num Lock.

3.    Using the numeric keypad, type the first number in the calculation.

4.    On the keypad, type + to add, - to subtract, * to multiply, or / to divide.

5.    Type the next number in the calculation.

6.    Press Enter to complete the calculation.

Three odd keys

So far, we've discussed almost every key you're likely to use. But for the truly inquisitive, let's explore the three most mysterious keys on the keyboard: PrtScn, Scroll Lock, and Pause/Break.

PrtScn (or Print Screen)

A long time ago, this key actually did what it says—it sent the current screen of text to your printer. Nowadays, pressing PrtScn captures an image of your entire screen (a "screen shot") and copies it to the Clipboard in your computer's memory. From there you can paste it (Ctrl+V) into Microsoft Paint or another program and, if you want, print it from that program.

More obscure is SYS RQ, which shares the key with PrtScn on some keyboards. Historically, SYS RQ was designed to be a "system request," but this command is not enabled in Windows.

 Tip

Press Alt+PrtScn to capture an image of just the active window, instead of the entire screen.

ScrLk (or Scroll Lock)

In most programs, pressing Scroll Lock has no effect. In a few programs, pressing Scroll Lock changes the behavior of the arrow keys and the Page Up and Page Down keys; pressing these keys causes the document to scroll without changing the position of the cursor or selection. Your keyboard might have a light indicating whether Scroll Lock is on.

Pause/Break

This key is rarely used. In some older programs, pressing this key pauses the program or, in combination with Ctrl, stops it from running.

Other keys

Some modern keyboards come with "hot keys" or buttons that give you quick, one-press access to programs, files, or commands. Other models have volume controls, scroll wheels, zoom wheels, and other gadgets. For details about these features, check the information that came with your keyboard or computer, or go to the manufacturer's website.

Tips for using your keyboard safely

Using your keyboard properly can help avoid soreness or injury to your wrists, hands, and arms, particularly if you use your computer for long periods of time. Here are some tips to help you avoid problems:

·         Place your keyboard at elbow level. Your upper arms should be relaxed at your sides.

·         Center your keyboard in front of you. If your keyboard has a numeric keypad, you can use the spacebar as the centering point.

·         Type with your hands and wrists floating above the keyboard, so that you can use your whole arm to reach for distant keys instead of stretching your fingers.

·         Avoid resting your palms or wrists on any type of surface while typing. If your keyboard has a palm rest, use it only during breaks from typing.

·         While typing, use a light touch and keep your wrists straight.

·         When you're not typing, relax your arms and hands.

·         Take short breaks from computer use every 15 to 20 minutes.