Keypad Mode (Overview)
----------------------

"Keypad Mode" is a mouse-based interface to the Calculator.  It is
designed for use with the X window system.  If you don't have X, you
will have to operate keypad mode with your arrow keys (which is
probably more trouble than it's worth).  Keypad mode is currently not
supported under Emacs 19.

Type `M-# k' to turn Keypad Mode on or off.  Once again you get two
new windows, this time on the righthand side of the screen instead of
at the bottom.  The upper window is the familiar Calc Stack; the lower
window is a picture of a typical calculator keypad.

                                             |--- Emacs Calculator Mode --
                                             |2:  17.3
                                             |1:  -5
                                             |    .
                                             |--%%-Calc: 12 Deg       (Calcul
                                             |----+-----Calc 2.00-----+----1
                                             |FLR |CEIL|RND |TRNC|CLN2|FLT |
                                             |----+----+----+----+----+----|
                                             | LN |EXP |    |ABS |IDIV|MOD |
                                             |----+----+----+----+----+----|
                                             |SIN |COS |TAN |SQRT|y^x |1/x |
                                             |----+----+----+----+----+----|
                                             |  ENTER  |+/- |EEX |UNDO| <- |
                                             |-----+---+-+--+--+-+---++----|
                                             | INV |  7  |  8  |  9  |  /  |
                                             |-----+-----+-----+-----+-----|
                                             | HYP |  4  |  5  |  6  |  *  |
                                             |-----+-----+-----+-----+-----|
                                             |EXEC |  1  |  2  |  3  |  -  |
                                             |-----+-----+-----+-----+-----|
                                             | OFF |  0  |  .  | PI  |  +  |
                                             |-----+-----+-----+-----+-----+

Keypad Mode is much easier for beginners to learn, because there is no
need to memorize lots of obscure key sequences.  But not all commands
in regular Calc are available on the Keypad.  You can always switch
the cursor into the Calc stack window to use standard Calc commands if
you need.  Serious Calc users, though, often find they prefer the
standard interface over Keypad Mode.

To operate the Calculator, just click on the "buttons" of the
keypad using your left mouse button.  To enter the two numbers
shown here you would click `1 7 . 3 ENTER 5 +/- ENTER'; to
add them together you would then click `+' (to get 12.3 on
the stack).

If you click the right mouse button, the top three rows of the keypad
change to show other sets of commands, such as advanced math
functions, vector operations, and operations on binary numbers.

Because Keypad Mode doesn't use the regular keyboard, Calc leaves the
cursor in your original editing buffer.  You can type in this buffer
in the usual way while also clicking on the Calculator keypad.  One
advantage of Keypad Mode is that you don't need an explicit command to
switch between editing and calculating.

If you press `M-# b' first, you get a full-screen Keypad Mode
(`full-calc-keypad') with three windows: The keypad in the lower left,
the stack in the lower right, and the trail on top.

See Keypad Mode, for further information.