In MS-DOS the
F1 function key
can be used to retype the last command issued one letter at
a time. The
F3 function key
can be used to retype the last command issued with a single
keystroke.
The Cursor Control Keys
Fig. 4-3 The Cursor Control Keys
The next group of keys is mainly used to control the movement of the cursor about the
screen. The
Cursor Up, Cursor Down, Cursor Left and Cursor Right
are used by most
software packages to move the cursor one space in the relevant direction. The
PgUp
and
PgDn
keys are usually used to scroll through data up or down one page (or screen) at a time,
though their use may vary with different software. The
Home
and
End
keys are usually used
to go to the beginning and end of a line, screen or document depending on the software.
Please refer to your software applications manuals for the precise functions of these keys.
In MS-DOS the
Cursor Left key
acts the same as the Backspace key, deleting the characters
to the left of the cursor. The
Cursor Right key
functions the same as the F1 key, retyping the
previous command one letter at a time.
Special Function Keys
The Insert Key
The
Insert key
is a toggle key and in MS-DOS and many other software packages, is used to
alternate between Insert and Overwrite modes. In Insert mode characters are placed in front
of existing text; in Overwrite mode characters type replace the original text. Many software
packages assign other special functions to the Insert key, details of which will appear in the
relevant manual.