To enter an error form during regular numeric entry, use the @kbd{p}
(``plus-or-minus'') key to type the @samp{+/-} symbol. (If you try actually
typing @samp{+/-} the @kbd{+} key will be interpreted as the Calculator's
-@kbd{+} command!) Within an algebraic formula, you can press @kbd{M-p} to
+@kbd{+} command!) Within an algebraic formula, you can press @kbd{M-+} to
type the @samp{+/-} symbol, or type it out by hand.
Error forms and complex numbers can be mixed; the formulas shown above
@smallexample
;;; Increase and decrease Calc precision. Dave Gillespie, 5/31/91.
-;;; (Include copyright or copyleft stuff here.)
+;; (Include copyright or copyleft stuff here.)
(defvar inc-prec-base-key "P"
"Base key for inc-prec.el commands.")