Emacs, switch to previous window

Question

In Emacs, C-x o takes me to the next window.

What keyboard macro takes me to the previous window in Emacs?

Answer 1

That'd be C-- C-x o

In other words, C-x o with an argument of -1. You can specify how many windows to move by inserting a numeric argument between C-u and the command, as in C-u 2 C-x o. (C-- is a shortcut for C-u - 1)