calc-dispatch-help is an interactive autoloaded Lisp function in `calc-misc.el'.

(calc-dispatch-help ARG)

C-x* is a prefix key sequence; follow it with one of these letters:

For turning Calc on and off:
C calc. Start the Calculator in a window at the bottom of the screen.
O calc-other-window. Start the Calculator but don't select its window.
B calc-big-or-small. Control whether to use the full Emacs screen for Calc.
Q quick-calc. Use the Calculator in the minibuffer.
K calc-keypad. Start the Calculator in keypad mode (X window system only).
E calc-embedded. Use the Calculator on a formula in this editing buffer.
J calc-embedded-select. Like E, but select appropriate half of => or :=.
W calc-embedded-word. Like E, but activate a single word, i.e., a number.
Z calc-user-invocation. Invoke Calc in the way you defined with `Z I' cmd.
X calc-quit. Turn Calc off.

For moving data into and out of Calc:
G calc-grab-region. Grab the region defined by mark and point into Calc.
R calc-grab-rectangle. Grab the rectangle defined by mark, point into Calc.
: calc-grab-sum-down. Grab a rectangle and sum the columns.
_ calc-grab-sum-across. Grab a rectangle and sum the rows.
Y calc-copy-to-buffer. Copy a value from the stack into the editing buffer.

For use with Embedded mode:
A calc-embedded-activate. Find and activate all :='s and =>'s in buffer.
D calc-embedded-duplicate. Make a copy of this formula and select it.
F calc-embedded-new-formula. Insert a new formula at current point.
N calc-embedded-next. Advance cursor to next known formula in buffer.
P calc-embedded-previous. Advance cursor to previous known formula.
U calc-embedded-update-formula. Re-evaluate formula at point.
` calc-embedded-edit. Use calc-edit to edit formula at point.

I calc-info. Read the Calculator manual in the Emacs Info system.
T calc-tutorial. Run the Calculator Tutorial using the Emacs Info system.
S calc-summary. Read the Summary from the Calculator manual in Info.

L calc-load-everything. Load all parts of the Calculator into memory.
M read-kbd-macro. Read a region of keystroke names as a keyboard macro.
0 (zero) calc-reset. Reset Calc stack and modes to default state.

Press `*' twice (`C-x * *') to turn Calc on or off using the same
Calc user interface as before (either C-x * C or C-x * K; initially C-x * C).