So, you are in the middle of a 300 line function and want to know what it is. How do you do this?
MCa goes to the beginning of the current function.
MCa
MCe jumps to the end of the current function
MCe
It works for elisp and c-derived languages (e.g. Java).
As a rule, I have enabled helper mode which-function , which displays the current function in the mode line (using this in my emacs configuration):
which-function
(require 'which-func) (which-function-mode t)