Sometimes, a function is only intended to be called interactively,
never directly from Lisp. In that case, give the function a
non-@code{nil} @code{interactive-only} property. This causes the
-byte compiler to warn if the command is called from Lisp.
+byte compiler to warn if the command is called from Lisp. The value
+of the property can be: a string, which the byte-compiler will
+use directly in its warning (it should end with a period,
+and not start with a capital, e.g. ``use @dots{} instead.''); @code{t};
+any other symbol, which should be an alternative function to use in
+Lisp code.
@menu
* Using Interactive:: General rules for @code{interactive}.