config.but

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\cfg{winhelp-topic}{terminal.blink}

The server can ask PuTTY to display text that blinks on and off.
This is very distracting, so PuTTY allows you to turn blinking text
off completely.

When blinking text is disabled and the server attempts to make some
text blink, PuTTY will instead display the text with a bolded
background colour.

Blinking text can be turned on and off by control sequences sent by
the server. This configuration option controls the \e{default}
state, which will be restored when you reset the terminal (see
\k{reset-terminal}). However, if you modify this option in
mid-session using \q{Change Settings}, it will take effect
immediately.

\S{config-answerback} \q{Answerback to ^E}

\cfg{winhelp-topic}{terminal.answerback}

This option controls what PuTTY will send back to the server if the
server sends it the ^E enquiry character. Normally it just sends
the string \q{PuTTY}.

If you accidentally write the contents of a binary file to your
terminal, you will probably find that it contains more than one ^E
character, and as a result your next command line will probably read
\q{PuTTYPuTTYPuTTY...} as if you had typed the answerback string
multiple times at the keyboard. If you set the answerback string to
be empty, this problem should go away, but doing so might cause
other problems.

Note that this is \e{not} the feature of PuTTY which the server will
typically use to determine your terminal type. That feature is the
\q{Terminal-type string} in the Connection panel; see
\k{config-termtype} for details.

You can include control characters in the answerback string using
\c{^C} notation. (Use \c{^~} to get a literal \c{^}.)

\S{config-localecho} \q{Local echo}

\cfg{winhelp-topic}{terminal.localecho}

With local echo disabled, characters you type into the PuTTY window
are not echoed in the window \e{by PuTTY}. They are simply sent to
the server. (The \e{server} might choose to echo them back to you;
this can't be controlled from the PuTTY control panel.)

Some types of session need local echo, and many do not. In its
default mode, PuTTY will automatically attempt to deduce whether or
not local echo is appropriate for the session you are working in. If
you find it has made the wrong decision, you can use this
configuration option to override its choice: you can force local
echo to be turned on, or force it to be turned off, instead of
relying on the automatic detection.

\S{config-localedit} \q{Local line editing}

\cfg{winhelp-topic}{terminal.localedit}

Normally, every character you type into the PuTTY window is sent
immediately to the server the moment you type it.

If you enable local line editing, this changes. PuTTY will let you
edit a whole line at a time locally, and the line will only be sent
to the server when you press Return. If you make a mistake, you can
use the Backspace key to correct it before you press Return, and the
server will never see the mistake.

Since it is hard to edit a line locally without being able to see
it, local line editing is mostly used in conjunction with local echo
(\k{config-localecho}). This makes it ideal for use in raw mode
\#{FIXME} or when connecting to MUDs or talkers. (Although some more
advanced MUDs do occasionally turn local line editing on and turn
local echo off, in order to accept a password from the user.)

Some types of session need local line editing, and many do not. In
its default mode, PuTTY will automatically attempt to deduce whether
or not local line editing is appropriate for the session you are
working in. If you find it has made the wrong decision, you can use
this configuration option to override its choice: you can force
local line editing to be turned on, or force it to be turned off,
instead of relying on the automatic detection.

\S{config-printing} Remote-controlled printing

\cfg{winhelp-topic}{terminal.printing}

A lot of VT100-compatible terminals support printing under control
of the remote server. PuTTY supports this feature as well, but it is
turned off by default.

To enable remote-controlled printing, choose a printer from the
\q{Printer to send ANSI printer output to} drop-down list box. This
should allow you to select from all the printers you have installed
drivers for on your computer. Alternatively, you can type the
network name of a networked printer (for example,
\c{\\\\printserver\\printer1}) even if you haven't already
installed a driver for it on your own machine.

When the remote server attempts to print some data, PuTTY will send
that data to the printer \e{raw} - without translating it,
attempting to format it, or doing anything else to it. It is up to
you to ensure your remote server knows what type of printer it is
talking to.

Since PuTTY sends data to the printer raw, it cannot offer options
such as portrait versus landscape, print quality, or paper tray
selection. All these things would be done by your PC printer driver
(which PuTTY bypasses); if you need them done, you will have to find
a way to configure your remote server to do them.

To disable remote printing again, choose \q{None (printing
disabled)} from the printer selection list. This is the default
state.

\H{config-keyboard} The Keyboard panel

The Keyboard configuration panel allows you to control the behaviour
of the keyboard in PuTTY.

\S{config-backspace} Changing the action of the Backspace key

\cfg{winhelp-topic}{keyboard.backspace}

Some terminals believe that the Backspace key should send the same
thing to the server as Control-H (ASCII code 8). Other terminals
believe that the Backspace key should send ASCII code 127 (usually
known as Control-?) so that it can be distinguished from Control-H.
This option allows you to choose which code PuTTY generates when you
press Backspace.

If you are connecting to a Unix system, you will probably find that
the Unix \c{stty} command lets you configure which the server
expects to see, so you might not need to change which one PuTTY
generates. On other systems, the server's expectation might be fixed
and you might have no choice but to configure PuTTY.

If you do have the choice, we recommend configuring PuTTY to
generate Control-? and configuring the server to expect it, because
that allows applications such as \c{emacs} to use Control-H for
help.

\S{config-homeend} Changing the action of the Home and End keys

\cfg{winhelp-topic}{keyboard.homeend}

The Unix terminal emulator \c{rxvt} disagrees with the rest of the
world about what character sequences should be sent to the server by
the Home and End keys.

\c{xterm}, and other terminals, send \c{ESC [1~} for the Home key,
and \c{ESC [4~} for the End key. \c{rxvt} sends \c{ESC [H} for the
Home key and \c{ESC [Ow} for the End key.

If you find an application on which the Home and End keys aren't
working, you could try switching this option to see if it helps.

\S{config-funkeys} Changing the action of the function keys and keypad

\cfg{winhelp-topic}{keyboard.funkeys}

This option affects the function keys (F1 to F12) and the top row of
the numeric keypad.

\b In the default mode, labelled \c{ESC [n~}, the function keys
generate sequences like \c{ESC [11~}, \c{ESC [12~} and so on. This
matches the general behaviour of Digital's terminals.

\b In Linux mode, F6 to F12 behave just like the default mode, but
F1 to F5 generate \c{ESC [[A} through to \c{ESC [[E}. This mimics the
Linux virtual console.

\b In Xterm R6 mode, F5 to F12 behave like the default mode, but F1
to F4 generate \c{ESC OP} through to \c{ESC OS}, which are the
sequences produced by the top row of the \e{keypad} on Digital's
terminals.

\b In VT400 mode, all the function keys behave like the default
mode, but the actual top row of the numeric keypad generates \c{ESC
OP} through to \c{ESC OS}.

\b In VT100+ mode, the function keys generate \c{ESC OP} through to
\c{ESC O[}

\b In SCO mode, the function keys F1 to F12 generate \c{ESC [M}
through to \c{ESC [X}.  Together with shift, they generate \c{ESC [Y}
through to \c{ESC [j}.  With control they generate \c{ESC [k} through
to \c{ESC [v}, and with shift and control together they generate
\c{ESC [w} through to \c{ESC [\{}.

If you don't know what any of this means, you probably don't need to
fiddle with it.

\S{config-appcursor} Controlling Application Cursor Keys mode

\cfg{winhelp-topic}{keyboard.appcursor}

Application Cursor Keys mode is a way for the server to change the
control sequences sent by the arrow keys. In normal mode, the arrow
keys send \c{ESC [A} through to \c{ESC [D}. In application mode,
they send \c{ESC OA} through to \c{ESC OD}.

Application Cursor Keys mode can be turned on and off by the server,
depending on the application. PuTTY allows you to configure the
initial state.

You can also disable application cursor keys mode completely, using
the \q{Features} configuration panel; see
\k{config-features-application}.

\S{config-appkeypad} Controlling Application Keypad mode

\cfg{winhelp-topic}{keyboard.appkeypad}

Application Keypad mode is a way for the server to change the
behaviour of the numeric keypad.

In normal mode, the keypad behaves like a normal Windows keypad:
with NumLock on, the number keys generate numbers, and with NumLock
off they act like the arrow keys and Home, End etc.

In application mode, all the keypad keys send special control
sequences, \e{including} Num Lock. Num Lock stops behaving like Num
Lock and becomes another function key.

Depending on which version of Windows you run, you may find the Num
Lock light still flashes on and off every time you press Num Lock,
even when application mode is active and Num Lock is acting like a
function key. This is unavoidable.

Application keypad mode can be turned on and off by the server,
depending on the application. PuTTY allows you to configure the
initial state.

You can also disable application keypad mode completely, using the
\q{Features} configuration panel; see
\k{config-features-application}.

\S{config-nethack} Using NetHack keypad mode

\cfg{winhelp-topic}{keyboard.nethack}

PuTTY has a special mode for playing NetHack. You can enable it by
selecting \q{NetHack} in the \q{Initial state of numeric keypad}
control.

In this mode, the numeric keypad keys 1-9 generate the NetHack
movement commands (\cw{hjklyubn}). The 5 key generates the \c{.}
command (do nothing).

Better still, pressing Shift with the keypad keys generates the
capital forms of the commands (\cw{HJKLYUBN}), which tells NetHack
to keep moving you in the same direction until you encounter
something interesting.

For some reason, this feature only works properly when Num Lock is
on. We don't know why.

\S{config-compose} Enabling a DEC-like Compose key

\cfg{winhelp-topic}{keyboard.compose}

DEC terminals have a Compose key, which provides an easy-to-remember
way of typing accented characters. You press Compose and then type
two more characters. The two characters are \q{combined} to produce
an accented character. The choices of character are designed to be
easy to remember; for example, composing \q{e} and \q{`} produces
the \q{\u00e8{e-grave}} character.

If your keyboard has a Windows Application key, it acts as a Compose
key in PuTTY. Alternatively, if you enable the \q{AltGr acts as
Compose key} option, the AltGr key will become a Compose key.

\S{config-ctrlalt} \q{Control-Alt is different from AltGr}

\cfg{winhelp-topic}{keyboard.ctrlalt}

Some old keyboards do not have an AltGr key, which can make it
difficult to type some characters. PuTTY can be configured to treat
the key combination Ctrl + Left Alt the same way as the AltGr key.

By default, this checkbox is checked, and the key combination Ctrl +
Left Alt does something completely different. PuTTY's usual handling
of the left Alt key is to prefix the Escape (Control-\cw{[})
character to whatever character sequence the rest of the keypress
would generate. For example, Alt-A generates Escape followed by
\c{a}. So Alt-Ctrl-A would generate Escape, followed by Control-A.

If you uncheck this box, Ctrl-Alt will become a synonym for AltGr,
so you can use it to type extra graphic characters if your keyboard
has any.

(However, Ctrl-Alt will never act as a Compose key, regardless of the
setting of \q{AltGr acts as Compose key} described in
\k{config-compose}.)

\H{config-bell} The Bell panel

The Bell panel controls the terminal bell feature: the server's
ability to cause PuTTY to beep at you.

In the default configuration, when the server sends the character
with ASCII code 7 (Control-G), PuTTY will play the Windows Default
Beep sound. This is not always what you want the terminal bell
feature to do; the Bell panel allows you to configure alternative