Functional and some special keys, Cursor keys, Numeric...

Functional and some special keys

The FI-F12 function keys are located in the upper row of the keyboard (Figure 7.1). They are programmed, so the actions performed when they are pressed depend on the specific program. In most programs, the & lt; F1 & gt; causes a hint (Help). In the Word editor, the & lt; F4 & gt; is used to repeat the last action, and the & lt; F12 & gt; - to perform the operation "Save as ... in the File menu.

In Table. 7.2 shows the purpose of special keys.

Table 7.2

Keys

Assignment

Esc

Cancel any actions and (or) exit the program, submenus, etc.

Ctrl, Alt, Shift

Keys used in conjunction with other keys to change their functions

Print Screen

Printout on the printer of information displayed on the screen

Scroll Lock

The function of this key is determined programmatically. For example, when Scroll Lock is on (the corresponding indicator is lit), you can move text on the screen with the

Pause/Break

Aborting program execution. To continue the program, you must press any key

Ctrl + Alt + Del

Restarting the computer's operating system

Ctrl + Break

Terminating the running program

Ctrl + PrintSc

Copying the screen image to the printer

Cursor keys

The cursor is called a flickering symbol on the screen (usually in the form of a vertical line), indicating the location of the display of the keyboard-printed character. The cursor keys are located to the right of the alphanumeric keys (see Figure 7.1). Their purpose is given in Table. 7.3.

Table 7.3

Keys

Assignment

Move the cursor, respectively, to the right, left, up and down by one position with a short press. If the cursor is pressed for a long time, the cursor moves continuously

Insert

Switching the keyboard from insert mode to replace mode and vice versa. In the insert mode, the symbol displayed on the keyboard is placed at the cursor position, expanding the text. The cursor moves to the right one position.

In replace mode, the character to be drawn is placed on the character to the right of the cursor, destroying it

Delete

Move a portion of the line to the left with the character that is pending at the cursor. Delete the selected object: text, image, etc.

Home,

End

Move the cursor to the first and last position of the line, respectively

PgUp,

PgDn

Move the cursor around the text, respectively, in the direction of its beginning and end on one page (usually 25 lines)

Numeric Keypad

The numeric keypad keys are located on the right side of the keyboard (see Figure 7.1). If you press the & lt; Num Lock & gt; (Num Lock), the Num Lock indicator lights up and the numeric keypad goes to the numeric entry mode (0-9), the mathematical symbols of the addition +/-, subtraction "-", multiplication (*), division (/) and the point (.). If you press the & lt; Num Lock & gt; key again, so that the corresponding indicator does not light up, the numeric keypad will go into the cursor control mode, which was discussed above.

thematic pictures

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