F3, C-x (: Start defining a macro.F4, C-x ): Stop defining a macro.F4, C-x e : Execute a macroC-u 42 C-x e: Execute a macro 42 times, using prefix argumentC-u 0 C-x e: Execute a macro until an error occurs, i.e. the end
of the buffer. Also M-0 C-x e, or M-0 F4.C-x C-k r: (apply-macro-to-lines) Apply macro to every line in
the region.See also Emacs Manual