I always forget this syntax...
C-x C-f /su::/etc/hosts
C-x C-f /sudo::/etc/hosts
C-x 3 C-x 3 C-x +
(defun split-3-windows-horizontally-evenly ()
(interactive)
(command-execute 'split-window-horizontally)
(command-execute 'split-window-horizontally)
(command-execute 'balance-windows)
)
(global-set-key (kbd "C-x <whatever keys you like") 'split-3-windows-horizontally-evenly)