input devices

1. THE COMPUTER
KEYBOARD & MOUSE
BY JULY LOBAN

6. S.No Keys & Description
1
Typing Keys
These keys include the letter keys (A-Z) and digit keys (09) which generally give the same layout as
that of typewriters.
2
Numeric Keypad
It is used to enter the numeric data or cursor movement. Generally, it consists of a set of 17 keys
that are laid out in the same configuration used by most adding machines and calculators.
3
Function Keys
The twelve function keys are present on the keyboard which are arranged in a row at the top of the
keyboard. Each function key has a unique meaning and is used for some specific purpose.
4
Control keys
These keys provide cursor and screen control. It includes four directional arrow keys. Control keys
also include Home, End, Insert, Delete, Page Up, Page Down, Control(Ctrl), Alternate(Alt),
Escape(Esc).
5
Special Purpose Keys/Navigation keys
Keyboard also contains some special purpose keys such as Enter, Shift, Caps Lock, Num Lock, Space
bar, Tab, and Print Screen.

7. Key name How to use it
Shift Press Shift in combination with a letter to type an uppercase letter.
Press Shift in combination with another key to type the symbol shown
on the upper part of that key.
Caps Lock Press Caps Lock once to type all letters as uppercase. Press Caps Lock
again to turn this function off. Your keyboard might have a light
indicating whether Caps Lock is on.
Tab Press Tab to move the cursor several spaces forward. You can also
press Tab to move to the next text box on a form.
Enter Press Enter to move the cursor to the beginning of the next line. In a
dialog box, press Enter to select the highlighted button.
Spacebar Press the Spacebar to move the cursor one space forward.
Backspace Press Backspace to delete the character before the cursor, or the
selected text.

8. 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. Here are
a few tips to help improve keyboard use:
•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.

9. The mouse is the
primary input
device used to
interact with objects
in Windows.

10. Simple
Action
Interaction Typical effect
1.Pointing Position the pointer to a specific object
without clicking any mouse buttons.
Target displays its hover state and any
dynamic affordances.
2.Hovering Position the pointer to a specific object
without clicking any mouse buttons and
without moving for at least a second.
Target displays its tooltip, infotip, or
equivalent.
3.Clicking Position the pointer to a specific, non-
selectable object and press and release a
mouse button without moving. Clicking takes
effect on the mouse button release to allow
users the opportunity to cancel the click by
moving the mouse off the target. Therefore,
mouse press only indicates the selected
target.
For single clicks with the primary
button, activate the object. For
double-clicks with the primary button,
activate the object and perform the
default command. For the secondary
button, display the object's context
menu.

11. 4.Selecting Position the pointer to a
specific, selectable object and
press and release a mouse
button.
For single clicks with the primary button,
select the object. If the users drags the
mouse, select a contiguous range of
objects. For double-clicks with the
primary button, select the object and
perform the default command.
For text, the right primary button click
sets the insertion point, the second
selects word at the insertion point, and
the third click selects the sentence or
paragraph.

12. 5.Pressing Position the pointer to a specific
object and press a mouse button
without releasing.
For auto-repeat functions (such as
pressing a scroll arrow to
continuously scroll), activate
repeatedly. Otherwise indicates the
start of a move, resize, split, or drag,
unless followed by a release without
moving.
6.Wheeling Move mouse wheel. Window scrolls vertically in direction
of mouse wheel movement.

13. Compound Mouse Interactions
Compound
Action
Interaction Typical effect Pointers
1.Moving If moving is a mode (entered by
giving a command), enter the mode,
position the pointer over a movable
object, press button and move
mouse, release mouse button. in this
case, the pointer changes shape to
indicate the mode.
otherwise, position the pointer over
a movable object's grabber, press
button and move mouse, release
mouse button. in this case, the
pointer doesn't need to change
shape.
object moves in
direction of
pointer
movement.
move
used to move a
window in any
direction.
pan
Used to move an
object within a
window in any
direction.

14. 2. Resizing Position the pointer over
a resizable border or
resize handle, press a
mouse button and move
mouse, and then release
the mouse button.
object resizes in direction of
pointer movement.
vertical and horizontal resize
used to resize a single
dimension.
diagonal resize
used to resize two dimensions
simultaneously.
row and column resize
Used to resize a row or column
in a grid.

15. 3. Splitting Position the pointer over
a splitter, press a mouse
button and move mouse,
and then release the
mouse button.
split pane border
moves in direction
of pointer
movement.
window splitters
Used to resize a split
pane vertically or
horizontally.
4.Dragging and
Dropping
Position the pointer over
a valid object for
dragging, press a mouse
button and move mouse
to a drop target, and
then release the mouse
button.
object is moved or
copied to the drop
target.
normal select
used over valid drag
targets. may also have
an info tip to indicate
specific effect.
unavailable
Used to indicate a
surface isn't a valid drop
target.