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.
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