tex-view
tex-view is an interactive compiled Lisp function in `tex-mode.el
'.
(tex-view)
Preview the last `.dvi' file made by running TeX under Emacs.
This means, made using M-x tex-region, M-x tex-buffer or M-x tex-file.
The variable `tex-dvi-view-command' specifies the shell command for preview.
You must set that variable yourself before using this command,
because there is no standard value that would generally work.